Samsung Rf25hmedbsr Rf25hmedbbc Rf25hmedbww Service Manual – pdf download

REFRIGERATOR FRENCH DOOR REFRIGERATOR MODEL NAME : RF28HMEDB** RF25HMEDB** RF30HMEDB** MODEL CODE : RF28HMEDBSR/AA RF28HMEDBBC/AA RF28HMEDBWW/AA RF25HMEDBSR/AA RF25HMEDBBC/AA RF25HMEDBWW/AA RF30HMEDBRS/AA RF28HMEDBSL/ML

REFRIGERATOR

CONTENTS 1. PRECAUTIONS(SAFETY WARNINGS)········5 2. PRODUCT SPECIFICATIONS·······················9 3. DISASSEMBLY AND REASSEMBLY··········20 4. TROUBLESHOOTING·································52 5. PCB DIAGRAM············································95 6. WIRING DIAGRAM····································100 7. BLOCK DIAGRAM·····································101 8. MODEL CODE TABLE·······························103

WARNING

IMPORTANT SAFETY NOTICE

The service guide is for service men with adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or dealer cannot be responsible for the interpretation of this information.

SAMSUNG ELECTRONICS AMERICA, INC. Technical Service Guide Copyright Š2010 All rights reserved. This service guide may not be reproduced in whole or in part in any form without written permission from the SAMSUNG ELECTRONICS Company.

Contents 1. Precautions(Safety Warnings).....................................................................5 2. Product Specifications..............................................................................9 2-1) Introduction of Main Function......................................................................................... 10 2-2) Specifications....................................................................................................................12 2-3) Interior Views....................................................................................................................13 2-4) Model Specification &Specification Chart......................................................................14 2-5) Dimensions of Refrigerator (Inches)...............................................................................17 2-6) Optional Material Specification....................................................................................... 19 3. Disassembly and Reassembly..................................................................20 3-1) PRECAUTION....................................................................................................................21 3-2) Refrigerator Door............................................................................................................. 22 3-3) Door Handle Refrigerator............................................................................................... 24 3-4) Door Handle Freezer & Flex zone................................................................................ 25 3-5) Refrigerator Light.............................................................................................................26 3-6) Cover-Display & Water-Dispenser..............................................................................26 3-7) Water-Dispenser (RF25HM**)....................................................................................... 27 3-8) Water-Dispenser (RF28HM**).......................................................................................29 3-9) Glass Shelf.......................................................................................................................30 3-10) Foldable Glass Shelf......................................................................................................31 3-11) Vegetable & Fruit Drawers Shelf...................................................................................31 3-12) Case Water Filter........................................................................................................... 32 3-13) Water Tank.....................................................................................................................33 3-14) Motor Damper................................................................................................................35 3-15) Water Filter (Assembly & Disassembly)......................................................................36 3-16) Vertical Hinged Section................................................................................................ 37 3-17) Evaporator Cover In Refrigerator.................................................................................38 3-18) Evaporator In Refrigerator............................................................................................39 3-19) Freezer Door..................................................................................................................40 3-20) Convertible Door............................................................................................................41 3-21) Flex Zone Door.............................................................................................................. 42 3-22) Ice-Maker......................................................................................................................43 3-23) Flex Zone Light.............................................................................................................45 3-24) Freezer Light.................................................................................................................45 3-25) Side Light.......................................................................................................................46 3-26) Door Switch In Freezer.................................................................................................46 3-27) Evaporator Cover In Freezer....................................................................................... 47 3-28) Evaporator In Freezer................................................................................................... 47 3-29) Comp Cooling Fan........................................................................................................48 3-30) Comp Cooling Fan Motor............................................................................................49 3-31) Machine Compartment..................................................................................................50 3-32) Electric Box....................................................................................................................50 3-33) Cover-Unit......................................................................................................................51 3-29) Cover-Unit......................................................................................................................51

Contents 4. TROUBLESHOOTING............................................................................... 52 4-1) Function for failure diagnosis.........................................................................................53 4-2) Diagnostic method according to the trouble symptom(Flow Chart).......................... 67 5. PCB DIAGRAM....................................................................................... 95 5-1) PBA Layout with part position........................................................................................96 5-2) PBA Layout with part position (Inverter Board)........................................................... 97 5-3) Connector Layout with part position (Main Board)......................................................98 5-4) Connector Layout with part position (Inverter Board).................................................99 6. Wiring Diagram.................................................................................... 100 7. Block Diagram......................................................................................101 7-1) Whole block diagram.....................................................................................................101 8. Model code table................................................................................. 103 8-1) RF28HM**....................................................................................................................... 103 8-2) RF25HM** ................................................................................................................... 104

1. Precautions(Safety Warnings)

● Unplug the appliance before the changing or repairing the electric parts. ➝ Be careful the electric shock. ● When exchanging the parts, use the correct parts. ➝ Check the model name, rating voltage, rating current, running temperature symbols. ● When troubleshooting, connect firmly the types of harness. ➝ Make not to be separated when some power is imposed. ● Check the traces of water infiltration at the electric parts. ➝ If there is a trace of water infiltration, exchange or tape the parts. ● Check the assemble status of parts after troubleshooting. ➝ It must be in the same assembled state when compared with the state before disassembly. ● Check the use circumstance of refrigerator. ➝ If the refrigerator is installed at the place that is damp or wet, or status of installation is unstable, change the installation place. ● Ground the refrigerator properly ➝ Particularly, Be sure to earth when there is a risk of an electric leakage by humidity or wetness. ● Do not use multi plugs in a plug socket at the same time.

Check if the power cord and socket is damaged, pressed, squeezed, or fired. ➝ If the plug or plug socket is damaged, repair or exchange it immediately. ● Do not allow consumers to repair the appliance by themselves. ● Do not store other materials except the foods. ➝ Drugs or scientific materials : difficult to keep precise temperature. ➝ The inflammables(alcohol, benzene, ether, LP gas, butane gas etc.): have risk of explosion.

5

Precautions(Safety Warnings) Read all instructions before repairing the product and follow the instructions in order to prevent danger or property damage.

Plug out and remove all the items in regrigerator prior to repair.

CAUTION/WARNING SYMBOLS DISPLAYED Warning

Caution

SYMBOLS means “Prohibited”.

Indicates that a danger of death or serious injury exists.

means “Do not disassemble”. means “No contact”. means ”Warning or Caution”.

Indicates that a risk of personal injury or material damage exists.

means “Unplug the unit before preforming service” means “Earth or Ground”.

Warning & Caution Plug out to exchange the interior lamp.

• It may cause electric shock.

Use the rated components on the replacement.

• Check the correct model, rated voltage, rated current, operating temperature and so on.

On repair, make sure that the wires such as harness are bundled tightly.

• Bundle tightly wires in order not to be detached by the external force and then not to be wetted.

comRated pone nts

Unplug

On repair, remove completely dust or other things of housing parts, harness parts, and check parts.

• Cleaning may prevent the possible fire by tracking or short.

After repair, check the assembled state of components.

• It must be in the same assembled state when compared with the state before disassembly.

6

Check if there is any trace indicating the permeation of water.

• If there is that kind of trace, change the related components or do the

necessary treatment

such as taping

using the

insulating tape.

Precautions(Safety Warnings) ❈ Please let users know following warnings & cautions in detail.

Warning & Caution

Do not allow users to put bottles or kinds of glass in the freezer.

• Freezing of the contents may inflict a wound.

Do not allow users to plug several appliances into the same power receptable.

• May cause abnormal generation of heat or fire.

Prohibition

Do not allow users to store articles on the product.

• Opening or closing the door may cause things to fall down, which may cause injury.

Do not allow users to store narrow and lengthy bottles or foods in a small multi-purpose room.

Do not allow users to store pharmaceutical products, scientific materials, etc., in the refrigerator.

Do not allow users to disassemble, repair or alter.

Do not allow users to bend the power cord with excessive force or do not have the power cord pressed by heavy article.

• It may hurt you when refrigerator door is opened and closed resulting in falling stuff down.

• It may cause fire or abnormal operation which leads to injury.

• The products which need precise temperature control should not be stored in the refrigerator.

• May cause fire.

Do not disassemble

Do not allow users to install the refrigerator in the wet place or the place where water splashes.

• Deterioration of insulation of electric parts may cause electric shock or fire.

Prohibition

Make sure of the earth.

• Be sure the product is properly grounded.

Earth

7

Precautions(Safety Warnings)

FLOORING

For proper installation, this refrigerator must be placed on a level surface of hard material that is the same height as the rest of the flooring. This surface should be strong enough to support a fully loaded refrigerator, or approximately 660lbs(299kg).

MOVING

Protect the finish of the flooring. Cut a large section of the cardboard carton and place under the refrigerator where you are working.

When moving, be sure to pull the unit straight out and push back in straight.

8

2. Product Specifications

2-1) Introduction of Main Function···························································································································· 10 2-2) Specifications···················································································································································· 12 2-3) Interior Views···················································································································································· 13 2-4) Model Specification &Specification Chart········································································································· 14 2-5) Dimensions of Refrigerator (Inches)················································································································· 17 2-6) Optional Material Specification························································································································· 19

9

Product Specifications 2-1) Introduction of Main Function

Surround Multi Flow • Uniform cooling for each shelf and even in corner in fresh food compartment by centerpositioned fan and duct with multiple flow effluences.

Twin Cooling System • The refrigerator and the freezer have two evaporators. Given this independent system, the freezer and the refrigerator are cooled individually as required and are, therefore, more efficient.

Food odor from the refrigerator does not affect food in the freezer due to separate air flow circulation.

Flex Zone • The Flex Zone is a full-width independent mid drawer with adjustable temperature control.

Counter Height Design • The Independent Mid Drawer(Flex zone) is counter Height to fit contemporary kitchen.

One Lever Dispenser • One lever dispenser can be get ice or water easily.

Secure Auto Close Door System • Secure Auto Close Door System • Cool tight doors • Energy saving • Preventing sweat on fridge doors

10

Product Specifications â–ś Changing Items NO 1

Item

Details

Ez-Open The freezer door and Mid drawer (Flex zone) Handle System open and close easily.

2

Emotional Lighting

The lighting helps you find groceries Easier by lighting down when you open Mid drawer(Flex zone) and freezer door.

3

Smart Divider

- Easy rail partition can divide off 4 independent spaces easily.

- The rail partition allows you to divide the space of the convertible room easier.

4

Slim Water Filtration System

Slim water filter is placed between crispers for changing filter conveniently without removing items from Refrigerator.

5

Touch Sensor Lighting

The display change more wider and apply Blue LED lighting.

And Touch Sensor Lighting make the refrigerator graceful.

11

New Model

Product Specifications 2-2) Specifications

ELECTRICAL SPECIFICATIONS Defrost Control

REFRIGERATOR

From 12 to 22 hrs(comp.run time)

Thermo Bimetal Protector

140°F(60°C)(off) 104°F(40°C)(on) F: 50°F(10°C)(off) R: 59°F(15°C )(off)

Defrost Thermistor(502AT) Electrical RatingAC115V 60Hz

AC115V 60Hz / 230V50Hz 11.6Amps

Maximum Current Leakage

0.25 mA

Maximum Ground Path Resistance

0.1 Ohm

NO LOAD PERFORMANCE Ambient Temperature Refrigerator

70°F(21°C)

90°F(32°C)

34°F(1°C)~46°F(7°C)

34°F(1°C)~46°F(7°C)

Flex Zone

29°F(-1°C)~42°F(5°C) 29°F(-1°C)~42°F(5°C)

Freezer

-8°F(-22°C)~8°F(-14°C) -8°F(-22°C)~8°F(-14°C)

Run Time,%

< 60

< 80

REFRIGERATION SYSTEM Refrigerant Charge (R134a)

5.64 oz(160g)

MKV190CL2B/E01, MKV190GL2B/E01

FLEX ZONE

1314 Btu/hr(0.385kw)

Compressor oil

Freol α 15c

<Israel Model (/ML)> Dryer-Single

C-Fan

FREEZER

Compressor

Condenser

INSTALLATION Clearance must be provided for air circulation AT TOP

2" (50mm)

AT SIDES

3¾"(95mm)

AT REAR

2" (50mm)

12

Product Specifications 2-3) Interior Views

Light

FF Ice-Maker

Foldable-Shelf

Slide-Shelf

Fixed-Shelf Quick-Space Glass Shelf

Vertical Hinged Section

Vegetable & Fruit Drawers Water Filter

Door Bins

Light Convertible Room Auto Pull Out Drawer

Guard

Freezer Drawer Bin

13

Product Specifications 2-4) Model Specification &Specification Chart

ITEM

RF28HM*

Model

Ice & Water Dispenser

W

External size

RF25HM*

35 6/8 Inch (908mm)

32 3/4 Inch (830mm)

On Cabinet

29 1/2 Inch (751mm)

30 Inch (765mm)

W/O Handle

34 Inch (864mm)

34 Inch (863mm)

With Handle

36 1/2 Inch (926mm)

36 1/2 Inch (925mm)

W/O Hinge Cap

68 7/8 Inch (1749mm)

68 7/8 Inch (1749mm)

With Hinge Cap

70 Inch (1777mm)

70 Inch (1777mm)

Total

27.93 Cu.ft (791ℓ)

24.69 Cu.ft (699.2ℓ)

Freezer

8.42 Cu.ft (238.5ℓ)

7.29 Cu.ft (206.5ℓ)

Flex Zone

3.80 Cu.ft (107.7ℓ)

3.39 Cu.ft (96ℓ)

Refrigerator

15.71 Cu.ft (444.9ℓ)

14.01 Cu.ft (396.8ℓ)

D

H

Net Capacity

Efficiency of Volume Set

Weight

Packing

60% 374.8 Pounds (170 kg) 332.9 Pounds (151 kg)

Packing

403.4 Pounds (183 kg)

355 Pounds (161 kg)

Width

38 1/4 Inch (972mm)

35 1/4 Inch (894mm)

Depth

36 7/8 Inch (937mm)

36 1/4 Inch (920mm)

Height

76 5/8 Inch(1946mm)

76 3/8 Inch (1939mm)

Compressor

Reciprocate

Rated Frequency and Frequency

AC 115 V / 60 Hz (/AA-North America) AC 230 V / 50 Hz (/ML-Israel)

Refrigerant

R-134a

Foaming Agent

C-Pentane

Refrigerant Input Amount

5.64 oz (160g)

Type Refrigerator

Indirect Cooling Method Refrigerator

Motor Rated Consumption Power

120W

Electric Heater Rated Consumption Power

507.8W

14

Product Specifications

Components for Freezer

Items Compressor

Freezer Flex Refrigerator Defrost Cycle

MKV190C-L2B / MKV190G2EB/E01

Starting type

BLDC Forced and Natural Convection Type

Refrigerant

R-134a Temperature Selection

ON(℉)

OFF(℉)

-8℉(-22℃)

-5℉(-20℃)

-11℉(-24℃)

-2℉(-19℃)

1℉(-17℃)

-5℉(-21℃)

8℉(-14℃)

11℉(-12℃)

5℉(-15℃)

Temperature Selection

ON(℉)

OFF(℉)

29℉(-1℃)

32℉(0℃)

26℉(-3℃)

42℉(5℃)

45℉(7℃)

39℉(4℃)

Temperature Selection

ON(℉)

OFF(℉)

34℉(1℃)

36℉(2℃)

32℉(0℃)

38℉(3℃)

40℉(4℃)

36℉(2℃)

46℉(7℃)

48℉(8℃)

44℉(6℃)

THERMISTOR (F-SENSOR) 502AT

Model THERMISTOR (F-SENSOR) 502AT Model

THERMISTOR (R-SENSOR) 502AT

First Defrost Cycle (Concurrent defrost of F and R)

6hr ±10min

Defrost Cycle(FRE)

12~23hr(vary according to the conditions used)

Defrost Cycle(REF)

6~11hr(vary according to the conditions used)

Pause time

12 ±1min

F/R DefrostSensor Defrost Sensor

Room Temperature Sensor Components

Model

Condenser

Model

Defrost Related Components

Specification

F/R Bimetal-thermo Protector

F/R Thermo FuseAssy Protector

Model

THERMISTOR (502AT)

SPEC

5.0 ㏀ at 77℉(25℃)

Rated

AC 250V / 3A

Operating temperature

Off : 140℉(60℃) / On : 104℉(40℃)

Rated

AC 250V / 10A

Operating temperature

110(109)°C Off

15

Product Specifications

Items

Specification

Defrost Heater(FRE)

Heated at F Defrost

AC 230V, 230W

Defrost Heater(REF)

Heated at R Defrost

AC 230V, 120W

Heater-Ice Maker

F/S : AC 230V, 141W

DISPENSER Heater

Interlock with French Heater

AC 230V, 2.5W

FRENCH Heater

-

AC 230V, 10W

Heater Water Pipe

-

DC12V, 2.3W

Heater Ice room

-

DC12V, 2W AC 250V, 3A

Bimetal Thermo For Preventing of Refrigerator Heater

Electric Components

Over Load Relay

Off : 140°F(60℃). On : 104°F(40℃)

Model

4TM445PHBYY-82

Temp.ON

257± 41℉(125± 5℃)

Temp.OFF

156.2± 48.2℉(69± 9℃)

Rated Voltage

AC 230V / 50HZ

Motor BLDC (FRE)

DC12V, 2.1W / DREP5020LC

Motor BLDC (REF)

DC12V, 1.92W / 3612JL-04W-S49-G51

Motor BLDC (CIRCUIT)

DC12V, 1.7W / DRCP8020LA

Motor BLDC (ICE ROOM)

DC12V, 3.2W / DREP5020LB

Auger Motor

AC230V, 102W / ISG-3240SSJ

Geared Motor (ICE MAKER)

DC12V / GSP-24RW-001F

Geared Motor (DISPENSER)

AC230V, 3.5W / MVCD18AR19

Motor DAMPER

DC12V / NSBY001TJ1

Lamp LED(FRE)

DC 12V / 85 ~ 130mA DC 12V, 85~130mA

Lamp LED(REF)

DC 12V, 40~80mA

Lamp LED(VEG)

DC 12V / 95~145mA

Lamp LED(MID)

DC 12V / 85 ~ 130mA

Door Switch

FRE

DC 200V 0.5A / MDCG-4 (1EA)

REF

DC 200V 0.5A / MDCG-4 (2EA)

REF (ICE ROOM)

125VAC 5A, 250VAC 2.5A

MID

DC 200V 0.5A / MDCG-4 (1EA)

Power Cord

AC 250V / 16A

Earth Screw

BSBN (BRASS SCREW)

16

Product Specifications 2-5) Dimensions of Refrigerator (Inches) Model : RF28HM*

49 1/4" (1254mm)

29 1/2" (751mm)

35 6/8" (908mm)

20 3/4" (528mm)

4" (102mm)

36 1/2" (926mm)

1 1/4" (30.6mm)

8 15/16" (228mm) 22 9/16" (573mm)

22 9/16" (573mm)

1/2" (13mm)

2" (51mm)

70" (1777mm)

34" (864mm)

17

Product Specifications

Model : RF25HM*

17 1/8” (435mm)

53 3/4” (1366mm)

19 13/16” (503mm)

3 3/8" (87mm)

48" (1221 mm)

30” (765mm)

32 3/4” (830mm)

36 1/2" (925mm)

1 3/16" (29.6mm)

2 3/8" (59.5mm)

22 1/4" (564.5mm)

7/16" (11mm)

70" (1777mm)

9 1/16" (230mm)

35 1/4” (896mm)

34" (863mm)

18

Product Specifications 2-6) Optional Material Specification

Part Name

Part Code

AMOUNT

ASSYPACKING SUB

DA99-03490L

1

LED LAMP REF

DA97-12606A

1

LED LAMP CASE-VEG R, L

DA41-00519S

1

LED LAMP FRE

DA41-00676G

1

LED LAMP MID

DA41-00676G

1

LED LAMP REF(SIDE)

DA41-00519Q

2

19

3. Disassembly and Reassembly 3-1) PRECAUTION·························································································································································· 21 3-2) Refrigerator Door····················································································································································· 22 3-3) Door Handle Refrigerator········································································································································· 24 3-4) Door Handle Freezer & Flex zone··························································································································· 25 3-5) Refrigerator Light····················································································································································· 26 3-6) Cover-Display & Water-Dispenser··························································································································· 26 3-7) Water-Dispenser (RF25HM**)·································································································································· 27 3-8) Water-Dispenser (RF28HM**)·································································································································· 29 3-9) Glass Shelf······························································································································································· 30 3-10) Foldable Glass Shelf·············································································································································· 31 3-11) Vegetable & Fruit Drawers Shelf···························································································································· 31 3-12) Case Water Filter··················································································································································· 32 3-13) Water Tank····························································································································································· 33 3-14) Motor Damper························································································································································ 35 3-15) Water Filter (Assembly & Disassembly)················································································································· 36 3-16) Vertical Hinged Section·········································································································································· 37 3-17) Evaporator Cover In Refrigerator··························································································································· 38 3-18) Evaporator In Refrigerator····································································································································· 39 3-19) Freezer Door·························································································································································· 40 3-20) Convertible Door···················································································································································· 41 3-21) Flex Zone Door······················································································································································ 42 3-22) Ice-Maker······························································································································································· 43 3-23) Flex Zone Light······················································································································································ 45 3-24) Freezer Light·························································································································································· 45 3-25) Side Light······························································································································································· 46 3-26) Door Switch In Freezer·········································································································································· 46 3-27) Evaporator Cover In Freezer································································································································· 47 3-28) Evaporator In Freezer············································································································································ 47 3-29) Comp Cooling Fan················································································································································· 48 3-30) Comp Cooling Fan Motor······································································································································· 49 3-31) Machine Compartment··········································································································································· 50 3-32) Electric Box···························································································································································· 50 3-33) Cover-Unit······························································································································································ 51

20

Disassembly and Reassembly 3-1) PRECAUTION • Unplug the refrigerator before cleaning and making repairs.

• Remove any foreign matter or dust from the power plug pins.

- Otherwise there is a risk of fire.

• Do not use a cord that shows cracks or abrasion damage along its length or at either end.

• Do not plug several appliances into the same multiple power board. The refrigerator should always be plugged into its own individual electrical which has a voltage rating that matched the rating plate.

- This provides the best performance and also prevents overloading house wiring circuits, which could cause a fire hazard from overheated wires.

• Do not install the refrigerator in a damp place or place where it may come in contact with water.

- Deteriorated insulation of electrical parts may cause an electric shock or fire.

• The refrigerator must be grounded.

- You must ground the refrigerator to prevent any power leakages or electric shocks caused by current leakage from the refrigerator.

• Do not put bottles or glass containers in the freezer.

- When the contents freeze, the glass may break and cause personal injury.

• Do not store volatile or flammable substances in the refrigerator.

- The storage of benzene, thinner, alcohol, ether, LP gas and other such products may cause explosions.

- Required Tools IMAGE

ITEM

USE

Phillips Head Driver

Use for assembling and disassembling of screw

Flat Head Driver

Use for assembling and disassembling of HomeBar, Dispenser, Deli Cartessen Box, Main PBA etc...

Hex Wrench ø2mm

Use for assembling and disassembling of Handle

Socket Wrench ø10mm

Use for assembling and disassembling of Door Hinge

- Water whitening phenomenon All water provided to refrigerators flows through the core filter which is an alkaline water filter.

In this process, the pressure in the water that has flowed out of the filter gets increased, and massive oxygen and nitrogen become saturated. When this water flows out in the air, the pressure plummets and the oxygen and nitrogen get supersaturated so that they turn into gas bubbles. The water could look misty due to these oxygen bubbles. It is not because dust or chemicals, just a few seconds later, it will be clean again.

21

Disassembly and Reassembly 3-2) Refrigerator Door

Part Name

How To Do

Descriptive Picture

1. Remove the 3 screws holding down the Top Table and remove the Top Table ()





2. Disconnect the electrical () above the upper left door hinge To disconnect the connector () more easily, press the end of the hook () and pull connector.

CAUTION

Make sure unit is unplugged. 

Refrigerator Door 3. As shown in the picture, Remove water tube from hinge () by holding at the both sides of the Tube Fitting and pulling it out. And, remove the Tube Fitting () by pulling the water hose after pushing in the locking ring tab at the end of the Tube Fitting.

4. After pulling the Hinge Lever, remove the Hinge.

22





Disassembly and Reassembly

Part Name

How To Do

Descriptive Picture

5. Lift the door straightly up to remove.

CAUTION

Be careful not to drop the door.

Refrigerator Door 6. Lift the grommet hinge straightly up to remove.

7. With a Philips head screwdriver, remove the screw () attatched to the lower left and right door hinges.

With a 0.4in Hex wrench, remove the 2 flat head screws () Remove the lower left and right door hinges ().

23







Disassembly and Reassembly 3-3) Door Handle Refrigerator

Part Name

How To Do

1. Loose Set Screw with 0.1in Hex wrench and pull front the handle.

Door Handle Fridge

2. Remove the cover vinyl of door.

24

Descriptive Picture

Disassembly and Reassembly 3-4) Door Handle Freezer & Flex zone

Part Name

How To Do

1. Loosen the Set Screw situated at the bottom right of the appliance about 0.1in by using Hex wrench.

Door Handle Freezer

2. Pull the Set handle out by moving it to the right side.

CAUTION

Be careful not to scratch or break the parts

25

Descriptive Picture

Disassembly and Reassembly 3-5) Refrigerator Light

Part Name

How To Do

Descriptive Picture

1. Press the tabs on the back of the Lamp Cover and take it off.

Refrigerator Light

2. Remove the 2 screws And separate the LED panel.

3-6) Cover-Display & Water-Dispenser Part Name

How To Do

1. Remove a screw under the display cover.

Cover-Display

2. Remove the display cover by pulling it up.

Put the thumbs on the surface door and hold the bottom of the Display Panel with four fingers. And then, pull out the Display Panel as shown in the photo to remove it.

CAUTION

Take care not to break the Locking Tabs.

26

Descriptive Picture

Disassembly and Reassembly

Part Name

Cover-Display

How To Do

Descriptive Picture

3. Disengage the housing connect of display cover.

3-7) Water-Dispenser (RF25HM**) Part Name

How To Do

1. Disengage the Housing Connectors by pushing a flat-blade screwdriver.

Water-Dispenser

2. Remove 2 screws of the Case Ice Route Assy.

3. Pull the Case Ice Route Assy.

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Descriptive Picture

Disassembly and Reassembly

Part Name

How To Do

Descriptive Picture hose

1. Assembly shall be in order from the disassembly. Case-Ice and Route shall be assembled inside of hose.

Otherwise, assemble cannot be accomplished.

Water-Dispenser HOSE HOSE

2. When assembling Cover-Display, first insert it from leftside and then assemble to rightside.

Otherwise, the hook can be broken.

î&#x2026;Ş

î&#x2026;Ť

28

Disassembly and Reassembly 3-8) Water-Dispenser (RF28HM**) Part Name

How To Do

1. Disengage the Housing Connector by pushing a flat-blade screwdriver.

2. Remove 2 screws of the Case Ice Route Assy.

Water-Dispenser 3. Pull the Case Ice Route Assy.

(Ice/Water model )

4. Assembly shall be in order from the disassembly. Make sure to fix the hose to the Case Ice Route before assembling the Display.

5. When assembling Cover-Display, first insert it from upper side and then assemble to bottom side.

Otherwise, the hook can be broken.

29

Descriptive Picture

Disassembly and Reassembly 3-9) Glass Shelf Part Name

Glass Shelf

How To Do

Remove the shelf by lifting the front part of the shelf up and pulling it out.

30

Descriptive Picture

Disassembly and Reassembly 3-10) Foldable Glass Shelf Part Name

Foldable Glass Shelf

How To Do

Descriptive Picture

1. Remove the Cap. 2. Remove 2 screws of the Folderble Glass Shelf.

3-11) Vegetable & Fruit Drawers Shelf Part Name

How To Do 1. Remove the vegetable & fruit drawer by pulling the roller part and lifting it up.

Vegetable & Fruit Shelf

2. While pressing the button on the left of the shelf in txhe picture, lift up the Vegetable & Fruit Drawer Shelf.

(Refer to the picture)

3. Remove the vegetable & fruit drawer shelf by pulling it out.

(Refer to the picture)

31

Descriptive Picture

Disassembly and Reassembly 3-12) Case Water Filter Part Name

How To Do

Descriptive Picture

To disassemble the Case Water Filter, remove the water filter and all drawers and shelves.

1. Remove the 3 screws holding down the Top Table and remove the Top Table ().

Case Water Filter

2. a. Remove Cover Tube Fitting (). b. Remove the Water tube (blue) from the tube fitting by pushing in on the locking ring () and pulling out the tube.





3. Remove three screws securing the water tubes.

4. a. Pull the Water blue hose out. b. Push the Tube Fitting () and pull the grey hose out.

32



Disassembly and Reassembly

Part Name

How To Do

Descriptive Picture

5. Disconnect the 2 Housing connectors ().



Case Water Filter 6. Lift and pull the Case Water Filter out.

3-13) Water Tank Part Name

How To Do

Descriptive Picture 

Before disassembling the Water Tank take the water filter() and water tray() out.

Water Tank

1. Remove 2 screws beside.

2. a. Lose the hooks by pushing the flat-blade driver.

33



Disassembly and Reassembly

Part Name

How To Do

Descriptive Picture

b. L ose the hooks by pushing the flat-blade driver.

3. Cut the sponge stick on the Case Water tank. and divide Case Water Tank.

 Water Tank

4. Remove the tube clips() and disconnect the water tank hoses by pulling the fitting tube.

5. Be careful when you connect the hoses. White hoses() go to the In mark( ).

Other hoses() go to the out mark ( ).

34







Disassembly and Reassembly 3-14) Motor Damper Part Name

How To Do

1. Remove the 2 screws under the. water filter case and take off the cover damper(â&#x2018;Ą).

Motor Damper

2. Disengage 2 housing connector.

3. Take off the Motor Damper by pulling a flat-blade screwdriver .

35

Descriptive Picture

Disassembly and Reassembly 3-15) Water Filter (Assembly & Disassembly) Part Name

How To Do

Descriptive Picture

1. Turn the water filter countclockwise. (Refer to the picture)

2. Remove the water filter by pulling it.

(Refer to the picture)

Water Filter

3. Push the water filter directly.

4. Turn the water filter clockwise until it locked.

CAUTION

Be sure to flush the dispenser thoroughly (approx. 6 to 7 minutes), otherwise water may drip from the dispenser. This means that there is still air in the line.­

36

Disassembly and Reassembly 3-16) Vertical Hinged Section Part Name

How To Do 1. Remove 2 screw cap parts with a flat-blade(-) screwdriver.

(Refer to the picture)

CAUTION

Be careful not to scratch or break the parts

2. Unscrew 2 screws.

Vertical Hinged Section 3. Disengage the internal housing connector of the vertical hinge.

4. Remove the vertical hinged section by lifting the vertical hinge up.

(Refer to the picture)

37

Descriptive Picture

Disassembly and Reassembly 3-17) Evaporator Cover In Refrigerator Part Name

How To Do

Descriptive Picture

1. Remove the angle cap with a flatblade screwdriver.

(Refer to the picture)

CAUTION

Be careful not to scratch or break the parts

2. Unscrew 4 screws.

î&#x2026;Ť Evaporator Cover In Refrigerator

3. Remove the the lower part of angle mid by pulling it out and pushing it down.

(Refer to the picture) î&#x2026;Ş

4. Remove the hook by pulling it from the lower part and pushing the cover down.

(Refer to the picture)

5. Disconnect the 2 housing connectors. (Refer to the picture)

CAUTION

Continues a work after confirming that fan operation stops.

38

Disassembly and Reassembly 3-18) Evaporator In Refrigerator Part Name

How To Do

1. Remove the the housing cover by pushing both lateral sides of the housing cover () and pulling it out.

(Refer to the picture)

Descriptive Picture





< left >

Evaporator In Refrigerator

2. Disconnect the housing connector part on left side.

(Refer to the picture)

< right >

3. Disconnect the housing connector on right side.

4. Remove the evaporator by lifting the bottom side of it up and pulling it out.

(Refer to the pi cture)

 

39

Disassembly and Reassembly 3-19) Freezer Door Part Name

How To Do

1. Pull out the Pull Out Drawer by maximum.

2. After lifting the Pull Out Drawer up holding both sides, remove it at the rail system.

3. After lifting the Freezer Guard up holding both sides, remove it at the rail system.

CAUTION

Freezer Door

The box may get scratch on its side by getting twisted left and right when disassembling the drawer box.

4. Press the fixing hook of rail system.

5. After holding and pulling out the top of Freezer Door, remove it at the rail system.

CAUTION

Make sure there is no scratch at the end of Sliding Rail by being dented from the floor .

40

Descriptive Picture

Disassembly and Reassembly 3-20) Convertible Door Part Name

How To Do 1. Pull the and remove the convertible room (â&#x2018;Ą) by pulling it to your body with both hands. open to full extension.

2. Remove the cover housing (â&#x2018;Ą) by a flat-blade screwdriver.

Mid drawer

3. Disengage the housing.

4. Unscrew 4 bolts.

(2 bolts each on the both sides)

5. Lifting up the convertible door. remove the convertible door from the rail.

41

Descriptive Picture

Disassembly and Reassembly 3-21) Flex Zone Door Part Name

How To Do

6. Remove the shaft gear() by pull the pin() out.

Descriptive Picture





Mid drawer

7. Remove the screw and pull out The rail.

42



Disassembly and Reassembly 3-22) Ice-Maker Part Name

Ice Maker

How To Do 1. When pressing the Energy-Saver and the Fridge buttons on the Display together for 8 seconds at the same time, it will convert to the Test Mode and the entire Display function will be off.

2. When pressing any button within 15 seconds after it is shifted to the Test Mode, its function will change in the following order.

Manual operation1(FF) Manual operation2(0F-r) → manual defrost of fresh food compartments(rd) → manual defrost of fresh and freezer compartments(fd) → cancel(Display all off).

• Set unit to Fd for 5 minutes. This will allow for easy removal of the ice maker.

3. Lift up the Ice Bucket and pull it out.

4. Remove the screw from the Wire Housing Cover.

5. Remove the Wire Housing Cover.

6. Disconnect the Ice Maker Housing Connector.

43

Descriptive Picture

Disassembly and Reassembly

Part Name

How To Do

7. Remove the screw from the Duct Tray-ice.

8. With a flat blade screwdriver, push the duct to the right and remove it from the locking tab. (Refer to the image.)

9. With a flat blade screwdriver, pry down on the refrigerant tube to separate it from the bottom of the ice maker. (Refer to the image.)

Ice Maker

10. Push down the refrigerant pipe slightly and separate the refrigerant pipe and the Ice Maker Assembly completely.

11. While pressing the Hook, pull out the Ice Maker.

12. While pushing down the DuctTray-Ice, pull out the Ice Maker carefully and remove it. â&#x20AC;ť When removing the ice maker, be careful not to damage the grommets on the tray or the refrigerant tube. (Refer to the dotted parts on the right side photo.) â&#x20AC;ť If the ice maker is frozen, it can be melt by using the steam heater.

44

Descriptive Picture

Disassembly and Reassembly 3-23) Flex Zone Light Part Name

How To Do

Descriptive Picture

1. Remove the cover Flex zone lamp (î&#x2020;˝) by a flat-blade screwdriver.

Flex Zone Light

2. Disengage the housing.

3-24) Freezer Light Part Name

How To Do

1. Remove the cover Freezer lamp like the way disassembling the Flex zone lamp.

Freezer Light

2. Disengage the housing.

45

Descriptive Picture

Disassembly and Reassembly 3-25) Side Light Part Name

How To Do

Descriptive Picture

1. Remove the cover Side lamp(â&#x2018;˘) by a flat-blade screwdriver.

Refrigerator Light

2. Separate the Side lamp from the case.

3. Disengage the housing.

3-26) Door Switch In Freezer Part Name

How To Do

1. Remove the cover Freezer lamp like the way disassembling the Flex zone lamp.

Door Switch In Freezer

2. Disengage the housing.

46

Descriptive Picture

Disassembly and Reassembly 3-27) Evaporator Cover In Freezer Part Name

How To Do

Descriptive Picture

1. Remove the freezer door and freezer drawer by pulling out the drawer and then unscrewing 2 screws.

Evaporator Cover In 2. Lift up the evaporator cover.

Freezer

3. Disengage the 3 housing connectors and remove the evaporator cover.

3-28) Evaporator In Freezer Part Name

How To Do

1. Remove the housing connector part left one.

Evaporator In Freezer 2. Remove the evaporator by pulling the lower part of the evaporator while lifting it up.

47

Descriptive Picture

Disassembly and Reassembly 3-29) Comp Cooling Fan Part Name

How To Do 1. Unscrew 5 screws of COVER COMP.

CAUTION

Be careful not to damage from the inner hole of cover comp.

2. Remove the DRAIN HOSE.

3. Remove 1 screw.

Comp Cooling Fan 4. Disengage the HOUSING CONNECTOR. (Refer to the picture)

5. Pull it forward and lean against the DRAIN HOSE.

6. Rotate it based on the PIPE.

7. The FAN is disassembled. / Assembly it in reverse order.

48

Descriptive Picture

Disassembly and Reassembly 3-30) Comp Cooling Fan Motor Part Name

How To Do

1. Remove the screw with a flat blade screwdriver.

2. Remove the motor fan by pulling the fan out while graping the motor part.

Comp Cooling Fan 3. Unscrew 2 screws fixed in the Motor motor.

4. Remove the BRACKET MOTOR with a flat blade screwdriver.

5. Remove the MOTOR after pulling the BRACKET MOTOR out.

49

Descriptive Picture

Disassembly and Reassembly 3-31) Machine Compartment Part Name

How To Do

Descriptive Picture

1. Disengage the housing connector.

Relay O/L

2. Remove Cover Relay.

3. Remove the relay O/L with a flatblade screwdriver.

(Refer to the picture)

3-32) Electric Box Part Name

How To Do

1. Remove the 2 screw attached to the upper left and right Case PCB Panel with a phillips screwdriver(+).

2. Disengage all housing connectors from the main PCB. PBA Main CAUTION

Before doing the above, make sure that the unit is unplugged.

3. Press the lower locking hook down and remove the Main PBA by pulling it out.

(Refer to the picture)

PBA INVERTER

1. Remove the INVERTER PBA by lifting the upper part of the hook up.

50

Descriptive Picture

Disassembly and Reassembly 3-29) Cover-Unit 3-33) Part Name

How To Do

Supplies : A general hexagonal wrench ( Thickness is under 6mm )

Cover-Unit

1. Check the hook on the mark of “△”.

2. Inset the wrench to the side of hook on the mark of “△”

3. Pull with the arrow direction and remove it.

51

Descriptive Picture

4. TROUBLESHOOTING

4-1) Function for failure diagnosis·······················································································································53 4-2) Diagnostic method according to the trouble symptom(Flow Chart)·····························································67

52

TROUBLESHOOTING 4-1) Function for failure diagnosis

4-1-1. Test mode (manual operation / manual defrost function) • If Freezer Key + Lighting Key on the front of panel are pressed simultaneously for 8 seconds , it will be changed to the test mode and all displays on the front of panel will be off.

• If any key on the front of panel is pressed within 15 seconds after the test mode, it will be operated as below sequence : Manual operation1(FF) Manual operation2(OF r) -> manual defrost of fresh food compartments(rd) -> manual defrost of fresh and freezer compartments(Fd) -> cancel(Display all off) • If any key on the front of panel is not pressed within 15 seconds after the test mode, the test mode will be canceled and it will be returned to previous mode.

1) Manual operation function

Freezer Key + Lighting Key are pressed simultaneously for 8 seconds, (displays are all off) It will be changed to the test mode (manual operation) by pressing any key.

1-1) If any key is pressed once in test mode, blinks "FF" on the display and it indicates the refrigerator has entered the manual operation. At this moment, buzzer beeps as an alarm.

1-2) If any key is pressed once at the manual operation1 status, OF-r will be displayed. FF and OF-r means manual operation 1 and 2 separately. These 2 functions operate with same RPM of COMP. 1-3) If manual operation is selected, compressor will run at once without 7 minutes delay in any mode. If the refrigerator is on the defrost cycle at the moment, defrost will be finished and manual operation will begin.

(Be careful if manual operation get started at the moment of compressor off, over load could be occurred) Compulsion working 1 : 3600RPM

Compulsion working 2 : 3600RPM

1-4) If manual operation works, compressor & f-fan operate continuously for 24 hours and fresh food compartment will be controlled by the setting temperature.

1-5) When the manual operation runs, setting temperature will be selected automatically as below: freezer compartment -8°F(-23°C), fresh food compartment 34°F(1°C).

1-6) During manual operation, Freezer Key & Power Cool function will not be work.

If a function is selected, the power function icon of the selected function will be off automatically after 10 seconds.

1-7) Manual operation can be canceled by removing power from the unit, then resupplying power.

1-8) Alarm(0.25 sec ON/ 0.75 sec OFF) will beep continuously until manual operation is completed and there is no function to make the sound stop.

53

TROUBLESHOOTING

2) Forced Defrost

2-1) When you press any key one more time at Fridge off Forced Operation [OF r], rd lights up on the Display Panel. At this time, the Forcd Operation stops immediately and R-Defrost will be performed at the same time.

2-2) When you press any key one more time at Forced R-Defrost [rd], Fd lights up on the Display Panel. At this time, FR-Defrost will be performed at the same time.

2-3) At this time, it will send out “Beep” sound for 2 seconds and then it will perform Forced F/R Defrost while sending out “0.5 sec On and 0.5 sec Off” sound.

3) Test cancel mode 3-1) During the simultaneous defrosting of fresh food and freezer compartments, if the display panel change to the test mode and test button is pressed one more time, defrosting of fresh food and freezer compartments will be canceled and the unit will return to the normal operation.

Or, all test functions will be canceled by turning main power ON and OFF.

4-1-2. Display function of Communication error 1) Display function when Panel ↔ MAIN MICOM communication has error 1-1) If there is no answer for 10 seconds after the panel micom received the requirement of communication, "PC- Er or PC-Ch" display on the panel PCB will be ON/OFF alternately until the communication error is canceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)

1-2) “PC- Er or PC-Ch” display on the Flex Zone Temp. Display will be ON/OFF alternately until the communication error is canceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)

2) Display function when Panel ↔ MAIN MICOM OPTION has error 2-1) ”oP-Er or oP-Ch” code is repeatedly ON/OFF until Option error settles down.

54

TROUBLESHOOTING

4-1-3. Self-diagnostic function 1) Self-diagnostic function in the Initial power ON 1-1) Micom operates self-diagnostic function to check the temperature sensor condition within 1 second when the refrigerator turned On initially.

1-2) If bad sensor is detected by the self-diagnostic function, the applicable display LED will blink for 0.5 sec.

At this moment, there is no beep sound.(Refer to self-diagnostic CHECK LIST) 1-3) Self-diagnostic button is recognized only when the error is displayed by the bad sensor. Display does not operate normally but temperature control will be controlled by the emergency operation.

1-4) When the error is detected by self-diagnosis, the error can be canceled automatically if all troubled sensors are corrected or Self-diagnostic function key (Freezer Key + Fridge Key ) are pressed simultaneously for 8 seconds.

(Return to normal display mode)

①

①

① If Freezer Key + Fridge Key are pressed simultaneously for 8 seconds, the error mode by self-diagnosis will be canceled.

2) Self-diagnostic function during normal operation

①

①

② If Freezer Key + Fridge Key are pressed simultaneously for 8 seconds, the self-diagnosis function will be selected.

2-1) If Freezer Key + Fridge Key are pressed simultaneously for 6 seconds during normal operation, the temperature setting display will operate for 2 seconds (ON/OFF 0.5sec each).

If Freezer Key + Fridge Key are pressed simultaneously for 8 seconds (including above 2 seconds), selfdiagnostic function will be selected.

2-2) At this moment, self-diagnostic function will be returned with buzzer sound 'ding-dong'.

If there is an error, display of error will be operated for 30 seconds and then return to normal condition whether problem is corrected or not.

(Refer to self-diagnosis CHECK LIST) 2-3) Input by button is not accepted during self-diagnostic function.

55

TROUBLESHOOTING ※ R Self-diagnostics check list LED F

R

Item

Trouble contents

Diagnostic method

FZ-Sensor Error

The voltage of MAIN PCB CN30- “3” N76-”1”: shall be between 4.5V~1.0V

FF-Sensor Error

The voltage of MAIN PCB CN30- “6” N76-”1”: shall be between 4.5V~1.0V

Display error : separation of sensor F Z - D E F - S e n s o r housing part, contact error, disconnection, Error short circuit.

Display error of detecting temperature of F F - D E F - S e n s o r sensor : more than 149℉(+65°C) or less Error than -58℉(-50°C)

The voltage of MAIN PCB CN30- “5” N76-”1”: shall be between 4.5V~1.0V The voltage of MAIN PCB CN30- “8” N76-”1”: shall be between 4.5V~1.0V

Ambient-Sensor Error

The voltage of MAIN PCB CN78- “8” CN78”12”: shall be between 4.5V~1.0V

Flex room-Sensor Error

The voltage of MAIN PCB CN78- “9” CN76”1”: shall be between 4.5V~1.0V

H u m i d i t y - S e n s o r Separation of sensor housing part, The voltage of MAIN PCB CN30- “1” CN30Error contact error, disconnection, short circuit ”7”: shall be between 4.5V~1.0V

or

Display error : separation of sensor Ice Maker(FF) Sensor housing part, contact error, disconnection, Error short circuit.

Display error of detecting temperature of Ice Room Sensor sensor : more than 149℉(+65°C) or less Error than -58℉(-50°C) Display error during operation of applicable fan motor : Feed back signal FZ-FAN Error line contact error, motor wire separation, motor error Display error during operation of applicable fan motor : Feed back signal FF-FAN Error line contact error, motor wire separation, motor error Display error during operation of applicable fan motor : Feed back signal C-FAN Error line contact error, motor wire separation, motor error Separation of freezer compartment defrost heater housing part, contact error, disconnection, short circuit or FZ-DEF Error temperature fuse error. Display error : the defrosting does not finish though freezer compartment defrost is heating continuously for more than 70 minutes.

Separation of fresh food compartment defrost heater housing part, contact error, disconnection, short circuit or FF-DEF Error temperature fuse error. Display error : the defrosting does not finish though fresh food compartment defrost is heating continuously for more than 80 minutes.

56

The voltage of MAIN PCB CN90- “1”↔ CN90”7”: shall be between 4.5V~1.0V The voltage of MAIN PCB CN78- “10” CN78”1”: shall be between 4.5V~1.0V The voltage of MAIN PCB CN76- “3”(Yellow) ↔ CN76-”1”(Gray): shall be between 7V~12V

The voltage of MAIN PCB CN76- “4”(Orange) ↔ CN76-”1”(Gray): shall be between 7V~12V

The voltage of MAIN PCB CN76- “5”(Sky-blue) ↔ CN76-”1”(Gray): shall be between 7V~12V After separating MAIN PCB CN70 wire from PCB, resistance value between CN70 Brown ↔ CN70 Gray shall be 63(230) ohm ± 7%.

(Resistance value is varied by input power) 0 ohm : heater short, ∞ ohm : wire/bimetal open (Must power off) After separating MAIN PCB CN70 wire from PCB, resistance value between CN70 White ↔ CN70 Gray shall be 120(440) ohm±7%.

(Resistanc e value is varied by input power) 0 ohm : heater short, ∞ ohm : wire/bimetal open (Must power off)

TROUBLESHOOTING ※ R Self-diagnostics check list LED F

R

Item

Flex Zone-DamperHeater Error

Ice Maker(FF) Function Error

Ice Room-FAN Error

Display ↔ ­Main Mycom Communication Error

Ice Duct Heater Error

Ice Room Bucket Heater Error

or

The F compartment abnormal hightemperature indicator blinks The R compartment abnormal hightemperature indicator blinks

Trouble contents

After separating MAIN PCB CN77 wire from Display error when open error is detected PCB, resistance value between Black ↔ Brown by damper heater : separation of Damper wire shall be 135 ohm± 7%.

Heater housing part, contact error, 0 ohm : heater short, ∞ Ohm : wire / bimetal disconnection, short circuit.

Open.

Display error when open error is detected After changing the Ice Maker(R), plug the

by Heater : separation of Ice Pipe Heater refrigerator power code again, and check the housing part, contact error, disconnection, operation. short circuit.

Display error when the Ice Maker(FZ) kit The voltage of MAIN PCB CN76-”2”(Black) ↔ operate moving ice over 3 times or it is CN76-”1” (Gray): shall be between 7V~12V not leveled.

Main mycom ↔ Display "41-E" message Actually, If there is not a problem, it is desirable and make a buzzing sound when the to replace Main and Panel PCB With the communication between displays does oscilloscope after a cable problem confirming. not work.

After separating MAIN PCB CN70 wire from Display error when open error is detected PCB, resistance value between CN70 Brown by ice duct heater : separation of Ice ↔ CN70 Gray shall be 63(230) ohm ± 7%.

Duct Heater housing part, contact error, (Resistance value is varied by input power) 0 disconnection, short circuit. ohm : heater short, ∞ ohm : wire/bimetal open (Must power off) After separating MAIN PCB CN79 wire from Display error when open error is detected PCB, resistance value between Yellow ↔ Pink by ice room bucket heater : separation wire shall be 135 ohm± 7%. of Ice Room Bucket Heater housing part, 0 ohm : heater short, ∞ Ohm : wire / bimetal contact error, disconnection, short circuit.

Open.

The temperature has been abnormally When the freezer temperature is increased. Check if the door has been open abnormally high or the freezer door is for a long time or if hot food has been stored in open for a certain period of time and the the compartment. If the reason for the error is freezer temperature increases, the freezer removed, the error code disappears after a predisplay blinks. determined period of time.

When the freezer temperature is Check if the door has been open for a long abnormally high or the fridge door is time or if hot food has been stored in the open for a certain period of time and the compartment. If the reason for the error is fridge temperature increases, the fridge removed, the error code disappears after a predisplay blinks. determined period of time.

Comp starting Failure When the Compressor fails starting Error IPM Fault Error

Diagnostic method

When there is a IPM Fault error

Check if there is a short between compressor terminals. Check IPM Voltage [Under 13.5V] Check if there is a short between IPM Pins [#1~33] Check the Compressor and the Cycle

Comp Abnormal Check the Compressor connections Check When there is abnormal current detected current Detection the voltage of Resistance of R308 [0.09Ohm] at the Compressor Error Check the Compressor and the Cycle Check the voltage of Resistance of R308 Motor Locked Over When there is a Compressor restriction [Short/Open] Check the voltage of both of RPM Error error C103 terminals [Unstable Voltage] Check the Compressor and the Cycle Comp under voltage When there is a low voltage error Error

Check the voltage of Resistance of R513 [Short/Open]

Comp over voltage Error

Check the voltage of Resistance of R501, R505, R509 [Short/Open]

When there is a over voltage error

F

R

57

TROUBLESHOOTING

4-1-4. Display function of Load condition

①

①

②

① I f Freezer Key + Fridge Key are pressed simultaneously for 6 seconds, ALL ON/OFF will blink with 0.5interval for 2 seconds. ② I f take the finger off from above keys and press Lighting, load condition mode will be started.

1) If Freezer Key + Fridge Key are pressed simultaneously for 6 seconds during normal operation, the temperature setting display of fresh food and freezer compartments will blink ALL ON/OFF with 0.5 for 2 seconds.

2) At this moment, If Lighting Key after Freezer Key + Fridge Key is pressed, load condition display mode will be returned with alarm. At LED all on state, only load condition display will blink ON/OFF with 0.5 seconds interval.

3) Load condition display mode shows the load that micom signal is outputting.

However, It means that micom signal is outputting, it does not mean whether load is operating or not. That is to say that though load operation is displayed, load could not be operated by actual load error or PCB relay error etc. (This function would be applied at A/S.) 4) Load condition display function will maintain for 30 seconds and then normal condition will be returned automatically.

5) Load condition display is as below. Only the load control LED will blink with 0.5interval in "Display LED" F-10

R-10 R-1

F-1

58

TROUBLESHOOTING ※ Load mode Check list Display LED

Display contents

Operation contents When FF compartment FAN operates with high R-1-ⓐ R-FAN High speed, applicable LED Blink When FF compartment FAN operates with low R-1-ⓑ R-FAN Low speed, applicable LED Blink When FF compartment defrost heater operates, R-1-ⓒ R-DEF Heater LED Blink R-1-ⓓ START MODE When refrigerator is plugged initially, LED Blink When ambient temperature is more than R-1-ⓔ Overload condition 93℉(35°C), LED Blink When ambient temperature is less than R-1-ⓕ Low temperature condition 72℉(21°C), LED Blink R-1-ⓔ,ⓕ When ambient temperature is between Normal Condition (ALL LED Off) 73℉(22°C) and 91℉(34°C) R-1-ⓖ Exhibition Mode LED Blink at the display mode.

F-1-ⓐ COMP. When COMP operates, applicable LED Blink When FZ compartment FAN operates with high F-1-ⓑ F-FAN High speed, applicable LED Blink When FZ compartment FAN operates with low F-1-ⓒ F-FAN Low speed, applicable LED Blink When FZ compartment defrost heater operates, F-1-ⓓ F-DEF Heater LED Blink When C-FAN operates with high speed, F-1-ⓔ C-FAN High applicable LED Blink When C-FAN operates with low speed, F-1-ⓕ C-FAN Low applicable LED Blink R-10-ⓐ Damper Open When damper open, applicable LED Blink I-DEF HEATER (Ice Maker R-10-ⓒ When ice maker heater operates, LED Blink HEATER) When the Ice Maker's Bucket is full, applicable R-10-ⓓ Full Ice LED Blink When Ice Room-FAN operates with high F-10-ⓓ Ice Room-FAN High speed, applicable LED Blink When Ice Room-FAN operates with low speed, F-10-ⓔ Ice Room-FAN Low applicable LED Blink When French Heater operates, applicable LED F-10-ⓖ French Heater Blink

59

Etc

TROUBLESHOOTING

4-1-5. Cooling OFF mode setting function

①

①

①

① If Freezer Key + Fridge Key + Alarm Key are pressed for 5 seconds, Cooling Off mode will be started.

1) If Freezer Key + Fridge Key + Alarm Key are pressed simultaneously for 5 seconds during normal operation, Cooling Off mode will be started with buzzer sound(ding-dong).

2) If above Freezer Key + Fridge Key + Alarm Key are pressed one more time, Cooling Off mode will be canceled.

3) If Cooling Off mode is selected, blinks "O-FF" on the temperature setting display of the panel and it indicates the refrigerator has entered the Cooling Off mode.

4) During Cooling Off mode, if fresh food and freezer compartments sensors are higher than 149°F (65°C) Cooling Off mode will be canceled automatically and freezing operation will be returned.

(There is no buzzer sound when the Cooling Off mode is canceled by the temperature) 5) Operation contents of Cooling Off mode - Display, Fan motor and etc operate normally, not to operate compressor only.

- Defrost is not operated. (including french heater) - Display function of the initial real temperature is finished.

-U nder the condition of Cooling Off mode, Cooling Off mode will be operated when Power On after Power OFF.

60

TROUBLESHOOTING

4-1-6. Option setting function • If Alarm Key + Fridge Key are pressed simultaneously for 12 seconds during normal operation, fresh food and freezer compartments temperature display will be changed to option setting mode.

KEY operation method for changing to option mode

① ①

① If Alarm Key + Fridge Key are pressed simultaneously for 12 seconds, option setting mode will be started.

KEY control method after converting to option mode

Code Down

Reference Value

Code

Reference Value Down

Reference Value Up

Code Up

※ Key control in option mode Freezer Key Alarm Key Fridge Key Lighting Key

Code Down key Code Up key Reference Value down key Reference Value Up key

• If the display changes to option setting mode, all displays will be off except freezer and fridge compartments temperature display as below.

(Fresh food and freezer compartments case will be explained only because all options are operated with the same method according to the option table.)

61

TROUBLESHOOTING

Code

Reference Value

1) For example, if you want to change freezer compartment standard temperature to -4℉(-2°C) by operating option, do as below. This function is for changing the standard temperature.

In -2℉(-19°C) of current temperature of freezer compartment, if you make the temperature lower to -4℉ (-2°C) by the option, the standard temperature would be controlled -6℉(-21°C) Therefore, if you change the setting of temperature option to -2℉(-19°C) on the panel, the appliance will be operated with -6℉(-21°C). It means that standard temperature is controlled -4℉(-2°C) less than setting temperature in the display.

NOTE

Basically, all the data in option has cleared from the factory.

Therefore, almost all setting value are "0".

But, some setting values could be changed for the purpose of improving performmance.

You need to check the product manual and/or specification.

Code

Reference Value

Code

Reference Value

Code

Reference Value

2) After changing to the option mode, fresh food compartment "0" , freezer compartment "0" will be displayed. ( Basically fresh food compartment "0", freezer "0" would be set at shipping process, but setting value could be changed for the purpose of improving product at mass producing process.)

Code Reference Valuevalue of freezer compartment will be set - If fresh food compartment "0" shows only, temperature reference and current freezer compartment temperature code will be displayed on the freezer temperature display.

3) If freezer compartment "4" is set as below freezer compartment code after fresh food compartment "0 is set, standard temperature of freezer compartment will be lower than -4℉(-2.0°C).

(Refer to the picture "changing the freezer compartment temperature")

: I f you wait for 20 seconds after completing the setting, MICOM will save the setting value to the EEPROM and normal display will be returned and the option setting mode will be canceled.

4) Option changing method as above is the same as all RFG29** model.

5) By the same method as above, it is possible to control the fresh food compartment temperature, water supply, ice-maker harvest temperature/time, defrost return time, hysteresis by temperature, notch gap by temperature etc.

6) Option function is set in the EEPROM at shipping process in Value the factory.

Code Reference You would better not to change the option of your own.

Completing the setting is that option function return to normal display after 20 seconds.

Do not turn off the appliance before returning to the normal display mode.

Code

NOTE

Reference Value

Option setting function exists in the other items.

We will skip the explanation of the other functions by the option because it is associated with refrigerator control function and is not needed at SERVICE. (Please do not set the other options except above SERVICE Manual.)

62 Code

Reference Value

TROUBLESHOOTING

4-1-7. Option TABLE 1) Temperature changing table of freezer compartment Freezer Temp Shift

Set item Reference Value

Fridge Room 7-SEG 0

Setting value FZ compartment Code

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Temp. compensation 0℉(0.0℃) -1℉(-0.5℃) -2℉(-1.0℃) -3℉(-1.5℃) -4℉(-2.0℃) -5℉(-2.5℃) -6℉(-3.0℃) -7℉(-3.5℃) +1℉(+0.5℃) +2℉(+1.0℃) +3℉(+1.5℃) +4℉(+2.0℃) +5℉(+2.5℃) +6℉(+3.0℃) +7℉(+3.5℃) +8℉(+4.0℃)

Code

Reference Value

Code

Reference Value

ex) If you want to change the freezer standard temperature to -4℉(-2°C)

2) Temperature changing table of fresh food compartment Set item Reference Value

fresh food Temp Shift Fridge Room 7-SEG 1

Code Reference Value Code Reference Value

Setting value FZ compartment Code

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Temp. compensation 0℉(0.0℃) -1℉(-0.5℃) -2℉(-1.0℃) -3℉(-1.5℃) -4℉(-2.0℃) -5℉(-2.5℃) -6℉(-3.0℃) -7℉(-3.5℃) +1℉(+0.5℃) +2℉(+1.0℃) +3℉(+1.5℃) +4℉(+2.0℃) +5℉(+2.5℃) +6℉(+3.0℃) +7℉(+3.5℃) +8℉(+4.0℃)

ex) If you want to change Reference the Code Value Reference Value fresh foodCode compartment standard temperature to 4℉(2°C)

Code Reference Value Code Reference Value

63

TROUBLESHOOTING

3) Operation rate changing table of dispenser heater Dispenser Heater Rate Fridge Room 7-SEG

Set item Reference Value

19

Setting value FZ compartment

Rate change

Code

0 1

+0.0%

+ 20% operation ( up to 100% )

Code

Reference Value

ex) If you want to change the dispenser heater operation rate to +20%

4) Temperature changing table of Pantry/MidCode Drawer Reference Room Value Set item Reference Value

Pantry/Mid Drawer Room Temp Shift Fridge Room 7-SEG 20

Setting value FZ compartment Code

0 1 2 3 4 5 6 7

Code

Reference Value

Code

Reference Value

Code

Reference Value

Temp. compensation 0℉(0.0℃) -1℉(-0.5℃) -2℉(-1.0℃) -3℉(-1.5℃) -4℉(-2.0℃) +1℉(+0.5℃) +2℉(+1.0℃) +3℉(+1.5℃)

ex) If you want to change the mid drawer room temperature to -2℉(-1.0℃)

Code

Reference Value

Code

Reference Value

64

Code

TROUBLESHOOTING Reference Value

5) Amount of water supply to ice tray Set item Reference Value

Amount of Water Supply Fridge Room 7-SEG 32

Code

Reference Value

Code

Reference Value

Setting value FZ â&#x20AC;&#x2C6; compartment

Amount of water supply

Code

0 1 2 3 4 5 6 7

setting value Setting value + 10cc -

ex) If you want to change the amount of water supply to ice tray to Setting value + 10cc

6) Time changing table of ice maker droppingCode standbyReference time Value Set item Reference Value

Ice Maker Standby Time Fridge Room 7-SEG 33

Setting value FZ â&#x20AC;&#x2C6; compartment Code

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Temp. compensation 14min.

13min.

12min.

11min.

10min.

15min.

16min.

17min.

18min.

19min.

20min.

21min.

22min.

23min.

24min.

25min.

Code

Reference Value

Code Code

Reference Value Reference Value

ex) If you want to change the ice maker dropping standby time to 18minutes.

65 Code

Reference Value

Code

Reference Value

Code

Reference Value

7) Temperature changing table of ice room Code

Reference Value

TROUBLESHOOTING

Set item Reference Value

Ice Room Temp Shift Fridge Room 7-SEG 34

Code

Reference Value

Code

Reference Value

Code

Reference Value

Code

Reference Value

Setting value FZ compartment Code

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Temp. compensation 0℉(0.0℃) -1℉(-0.5℃) -2℉(-1.0℃) -3℉(-1.5℃) -4℉(-2.0℃) -5℉(-2.5℃) -6℉(-3.0℃) -7℉(-3.5℃) +1℉(+0.5℃) +2℉(+1.0℃) +3℉(+1.5℃) +4℉(+2.0℃) +5℉(+2.5℃) +6℉(+3.0℃) +7℉(+3.5℃) +8℉(+4.0℃)

ex) If you want to change the ice room standard temperature to +5℉(+2.5℃) Code Reference Value

8) Temperature changing table of Ice Maker Dropping Temperature Set item Reference Value

Ice Maker Dropping Temperature Fridge Room 7-SEG 35

Setting value FZ compartment Code

0 1 2 3 4 5 6 7

Code

Reference Value

Code

Reference Value

Code

Reference Value

Temp. compensation -13℃ -12℃ -11℃ -10℃ -14℃ -15℃ -16℃ -17℃

ex) If you want to change the mid drawer room temperature to -2℉(-1.0℃)

66

TROUBLESHOOTING 4-2) Diagnostic method according to the trouble symptom(Flow Chart)

DATA1.Temperature table Resistance value and MICOM port voltage of sensor according to the temperature SENSOR CHIP : based on PX41C, PX41C, 502AT/ 103**(ICE MAKER SENSOR(MOLD)/FULL UP, 20Kohm ( Actual measurement = value of the table below X 2 )

℃

℉

-50 -49 -48 -47 -46 -45 -44 -43 -42 -41 -40 -39 -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6

-58 -56.2 -54.4 -52.6 -50.8 -49 -47.2 -45.4 -43.6 -41.8 -40 -38.2 -36.4 -34.6 -32.8 -31 -29.2 -27.4 -25.6 -23.8 -22 -20.2 -18.4 -16.6 -14.8 -13 -11.2 -9.4 -7.6 -5.8 -4 -2.2 -0.4 1.4 3.2 5 6.8 8.6 10.4 12.2 14 15.8 17.6 19.4 21.2

Voltage Resistance

℃

℉

4.694 4.677 4.659 4.641 4.622 4.602 4.581 4.560 4.537 4.514 4.490 4.465 4.439 4.412 4.385 4.356 4.326 4.296 4.264 4.232 4.199 4.165 4.129 4.093 4.056 4.018 3.980 3.940 3.899 3.858 3.816 3.773 3.729 3.685 3.640 3.594 3.548 3.501 3.453 3.405 3.356 3.307 3.258 3.208 3.158

-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

23 24.8 26.6 28.4 30.2 32 33.8 35.6 37.4 39.2 41 42.8 44.6 46.4 48.2 50 51.8 53.6 55.4 57.2 59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 82.4 84.2 86 87.8 89.6 91.4 93.2 95 96.8 98.6 100.4 102.2

153319 144794 136798 129294 122248 115631 109413 103569 98073 92903 88037 83456 79142 75077 71246 67634 64227 61012 57977 55112 52406 49848 47431 45146 42984 40938 39002 37169 35433 33788 32230 30752 29350 28021 26760 25562 24425 23345 22320 21345 20418 19537 18698 17901 17142

Voltage Resistance

℃

℉

3.107 3.057 3.006 2.955 2.904 2.853 2.802 2.751 2.700 2.649 2.599 2.548 2.498 2.449 2.399 2.350 2.301 2.253 2.205 2.158 2.111 2.064 2.019 1.974 1.929 1.885 1.842 1.799 1.757 1.716 1.675 1.636 1.596 1.558 1.520 1.483 1.447 1.412 1.377 1.343 1.309 1.277 1.253 1.213 1.183

40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84

104 105.8 107.6 109.4 111.2 113 114.8 116.6 118.4 120.2 122 123.8 125.6 127.4 129.2 131 132.8 134.6 136.4 138.2 140 141.8 143.6 145.4 147.2 149 150.8 152.6 154.4 156.2 158 159.8 161.6 163.4 165.2 167 168.8 170.6 172.4 174.2 176 177.8 179.6 181.4 183.2

67

16419 15731 15076 14452 13857 13290 12749 12233 11741 11271 10823 10395 9986 9596 9223 8867 8526 8200 7888 7590 7305 7032 6771 6521 6281 6052 5832 5621 5419 5225 5039 4861 4690 4526 4369 4218 4072 3933 3799 3670 3547 3428 3344 3204 3098

Voltage Resistance 1.153 1.124 1.095 1.068 1.040 1.014 0.988 0.963 0.938 0.914 0.891 0.868 0.846 0.824 0.803 0.783 0.762 0.743 0.724 0.706 0.688 0.670 0.653 0.636 0.620 0.604 0.589 0.574 0.560 0.546 0.532 0.519 0.506 0.493 0.481 0.469 0.457 0.446 0.435 0.424 0.414 0.404 0.394 0.384 0.375

2997 2899 2805 2714 2627 2543 2462 2384 2309 2237 2167 2100 2036 1973 1913 1855 1799 1745 1693 1642 1594 1547 1502 1458 1416 1375 1335 1297 1260 1225 1190 1157 1125 1093 1063 1034 1006 978 952 926 902 877 854 832 810

TROUBLESHOOTING

DATA2. Humidity Sensor table - Voltage output table @23°…, 5Vdc --- HTG3515CH/HTG3535CH RH(Temperature compensate ) = RH (Relative Humidity ) + ( Temp(°C) °© 23°C) x 0.05

℃

℉

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

909 943 977 1010 1043 1076 1109 1141 1173 1205 1235 1266 1297 1328 1359 1390 1420 1450 1480 1510 1540 1569 1598 1627 1656 1685 1713 1741 1769 1797 1825 1852 1879 1906 1933 1960 1986 2012 2038 2064 2090 2116 2142 2168 2194 2220

Voltage Resistance 186 193 200 207 213 220 227 233 240 247 253 259 265 272 278 284 291 297 303 309 315 321 327 333 339 345 350 356 362 368 373 379 384 390 395 401 406 412 417 422 428 433 438 444 449 454

744 772 800 827 854 881 908 935 961 987 1011 1037 1062 1088 1113 1138 1163 1188 1212 1237 1261 1285 1309 1333 1356 1380 1403 1426 1449 1472 1495 1517 1539 1561 1583 1605 1627 1648 1669 1690 1712 1733 1754 1776 1797 1818

℃

℉

46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

2246 2272 2298 2324 2350 2376 2402 2428 2454 2480 2505 2530 2555 2580 2605 2630 2655 2680 2705 2730 2756 2782 2808 2834 2860 2886 2912 2938 2964 2990 3017 3044 3071 3098 3125 3152 3179 3206 3233 3260 3288 3316 3344 3372 3400 3426

68

Voltage Resistance 460 465 470 475 481 486 491 497 502 507 513 518 523 528 533 538 543 548 553 559 564 569 575 580 585 590 596 601 606 612 617 623 628 634 639 645 650 656 661 667 673 678 684 690 696 701

1839 1861 1882 1903 1925 1946 1967 1989 2010 2031 2052 2072 2093 2113 2133 2154 2174 2195 2215 2236 2257 2278 2300 2321 2342 2364 2385 2406 2428 2449 2471 2493 2515 2537 2559 2581 2604 2626 2648 2670 2693 2716 2739 2762 2785 2806

℃

℉

92 93 94 95 96 97 98 99 100

3452 3478 3504 3530 3566 3595 3624 3653 3683

Voltage Resistance 706 712 717 722 730 735 741 747 754

2827 2848 2870 2891 2920 2944 2968 2992 3016

TROUBLESHOOTING

4-2-1. If the trouble is detected by self-diagnosis - The error of sensor will be displayed on the front of display. when the error of sensor is detected at initial power ON, the appliance will not operated and display of abnormal sensor part will blink.

- The appliance will not stop operating when the error of sensor is detected during operation of the appliance.

But normal freezing might be not operated if the appliance is operated by the emergency operation mode. You would better to check the appliance according to the self-diagnosis of the manual.

1) If ICE Maker(R) Sensor has troubled ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** ICE MAKER: CN90 ”1”↔ “7” measuring resistance value ** 0Ω: Short trouble / Ω∞: Open trouble

Is MAIN PCB Connector CN90 inserted correctly?

YES Is ICE Maker Sensor unit normal?

Refer to circuit diagram in the manual Sensor MICOM/Connector number ICE Connector CN90-"1"(Brown)and Maker J23 JUMMPER PCB typical Ground

Bad contact of connector/ insert correctly NO

Replace the temperature sensor

YES Is the voltage between MAIN PCB Connector CN90 - "1"(Brown) and J23 JUMMPER normal?

Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #71, CN90 - "1" (Brown) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R914 DUE to the SMD MICOM

NO

NO(0.6V > Measurement < 4.6V)

YES Is input voltage of IC01 MICOM #71 normal?

Recheck the wire connection part NO

YES

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

☞ Checking method of ICE Maker Sensor resistance CN90 "1"(Brown) ↔ "7"(Gray) - Compare the temperature table after the measure.

☞ Checking method of ICE Maker Sensor resistance - Measure the voltage of Resistance R914(IC01 MICOM #71) on PCB or CN90 "1"(Brown) ↔ J23 JUMMPER - Compare the temperature table after the measure.

Measuring voltage of CN90-"1"(Brown) ↔ J23 JUMMPER are as below.

69

Check the iced-solder, solder bridging, disturbed solder.

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

2) If R Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** R : CN30 - “6” ↔ CN76-"1" measuring resistance value ** 0Ω: Short trouble /Ω∞: Open trouble

Is MAIN PCB Connector CN30 and CN76 inserted correctly?

YES

NO

Is R Sensor unit normal?

NO

R

Measuring voltage IC01 MICOM #84, CN30 - “6”(White) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R311 due to the SMD MICOM

☞ Checking method of R Sensor resistance C N30 - “6”(White) ↔ CN76-"1"(Gray) Compare the temperature table after measurment.

Replace the temperature sensor

YES

Refer to circuit diagram in the manual Sensor MICOM/Connector number Connector CN30 - “6”(White) to J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V.

Bad contact of connector/ insert correctly

Is the voltage between MAIN PCB Connector CN30 - “6”(White) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM #84 normal?

Recheck the wire connection part NO

YES

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

Check the iced-solder, solder bridging, disturbed solder.

☞ Checking method of R Sensor resistance

- Measure the voltage of Resistance R311(IC01 MICOM #84) on PCB or CN30 - “6”(White) ↔ J23 JUMMPER - Compare the temperature table after measurement.

Measuring voltage of CN30 - “6”(White) ↔ J23 JUMMPER are as below.

70

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

3) If R DEF Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** R-DEF : CN30-"8" ↔ CN76-"1" measuring resistance value ** 0Ω: Short trouble Ω∞: Open trouble

Is MAIN PCB Connector CN30 and CN76 inserted correctly?

YES Is R DEF Sensor unit normal?

Refer to circuit diagram in the manual Sensor MICOM/Connector Number Connector CN30-"8"(Sky-blue) and R DEF J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #86 CN30-"8"(Sky-blue) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance R313 due to the SMD MICOM

NO

Bad contact of connector/ insert correctly NO

Replace the temperature sensor

YES Is the input voltage between MAIN PCB Connector CN30-”8”(Skyblue) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM # 86 normal?

Recheck the wire connection part NO

YES

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

☞ Checking method of R Sensor resistance CN30"8"(Sky-blue) ↔ CN76-"1"(Gray) - Compare the temperature table after measurement.

Check the iced-solder, solder bridging, disturbed solder.

☞ Checking method of R DEF Sensor resistance

- Measure the voltage of Resistance R313(IC01 MICOM #86) on PCB or CN30-”8”(Sky-blue) ↔ J23 JUMMPER - Compare the temperature table after measurement.

Measuring voltage of CN30-”8”(Sky-blue) ↔ J23 JUMMPER are as below.

71

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

4) If Ambient Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** Ambient : CN78-”8”↔ “12” measuring resistance value ** Placed in the right top table of upper hinge. ** 0Ω: Short trouble / Ω∞: Open trouble

Is MAIN PCB Connector CN78 inserted correctly?

YES Is Ambient Sensor unit normal?

Refer to circuit diagram in the manual Sensor MICOM/Connector number Connector CN78-"8"(Yellow) to Ambient J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #93 CN78-"8"(Yellow) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R315 due to the SMD MICOM

NO

Bad contact of connector/ insert correctly NO

Replace the temperature sensor

YES Is the voltage between MAIN PCB Connector CN78 ”8”(Yellow) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM #93 normal?

Recheck the wiring connection NO

YES

No trouble with PCB and temperature sensor Recheck the bad contact of the connection

☞ Checking method of Ambient Sensor resistance

CN78-”8”(Yellow) ↔ "12"(Yellow) - Compare the temperature table after measurement.

Check the iced-solder, solder bridging, disturbed solder

☞ Checking method of Ambient Sensor voltage

- Measure the voltage of Resistance R315(IC01 MICOM #93) on PCB or CN78-"8"(Yellow) ↔ J23 JUMMPER - Compare the temperature table after measurement.

Measuring voltage of CN78-"8"(Yellow) ↔ J23 JUMMPER are as below

72

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING 5) If F Sensor has trouble ERROR Code

Start Are MAIN PCB Connector CN30 inserted correctly?

DATA1.

Temperature table

YES

** Measuring point of resistance value according to Sensor ** F : CN30-"1" ↔ "4" measuring resistance value ** 0Ω: Short trouble / Ω∞: Open trouble

IS F Sensor unit normal?

Refer to circuit diagram in the manual

F

NO

Bad contact of connector/ insert correctly NO

Replace temperature sensor

YES

Sensor MICOM/Connector number Connector CN30-”4”(Yellow) to J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V.

Is the voltage between MAIN PCB Connector CN30-”4”(Yellow) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES

Measuring voltage of IC01 MICOM #82, CN30-”4”(Yellow) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R309 due to the SMD MICOM

Is the input voltage of IC01 MICOM #82 normal?

Recheck the wiring connection NO

Check the iced-solder, solder bridging, disturbed solder

YES

No trouble with PCB and temperature sensor Recheck the bad contact of the connection ☞ Checking method of F Sensor resistance CN30-"1"(Yellow) ↔ "4" (Yellow) - Compare the temperature table after measurement.

1

☞

Checking method of F Sensor voltage - Measure the voltage of Resistanec, R309(IC01 MICOM #82) on PCB or CN30-"4"(Yellow) ↔J23 JUMMPER - Compare the temperature table after measurement.

Measuring voltage of CN30-"4"(Yellow)↔J23 JUMMPER are as below.

2

[Disassemble the Cover Sensor]

8

[Assemble the Cover Sensor]

4

3

Strip : 10mm

[Cut the Sensor wire]

[Strip the end of Main wire]

7

[Fix with insula on tape]

100mm

Strip : 10mm

Cut as close as possible to the sensor

Cover Sensor

PCB Typical Ground J23 JUMMPER

6

[Connect Sensor and Main wire] by twis ng conductors

73

[Cut the Service Sensor wire and strip]

5

[Assemble Cover Sensor & Sensor]

TROUBLESHOOTING

6) If F DEF Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** F-DEF : C CN30-”5” ↔ CN76-”1” measuring resistance value ** 0Ω: Short trouble / Ω∞: Open trouble Refer to circuit diagram in the manual Sensor MICOM/Connector number Connector CN30-"5"(Orange) to F DEF J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #83, CN30-"5"(Orange) and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R310 due to the SMD MICOM

☞ Checking method of F DEF Sensor resistance CN30-"5"(Orange) ↔ CN76-”1”(Gray) - Compare the temperature table after measurement.

Are MAIN PCB Connector CN30 and CN76 insert correctly?

NO

YES IS FZ DEF Sensor unit normal?

Bad contact of connector/ insert correctly NO

Replace temperature sensor

YES Is the voltage between MAIN PCB Connector CN30-”5”(Orange) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM #83 normal?

Recheck the wiring connection NO

YES

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

☞ Checking method of F DEF Sensor voltage - Measure the voltage of Resistance, R310(IC01 MICOM #83) on PCB or CN30-"5"(Orange) ↔ J23 JUMMPER - Compare the temperature table after measurement.

Measuring voltage of CN30-"5"(Orange) ↔ J23 JUMMPER are as below

74

Check the iced-solder, solder bridging, disturbed solder

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

7) If Ice Room Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** Measuring point of resistance value according to Sensor ** Ambient : CN78 ”10”↔ CN76-”1” Measure the voltage of Resistance value ** 0Ω: Short trouble /Ω∞: Open trouble Refer to the circuit diagram in this manual Sensor MICOM/Connector number Connector CN78-"10"(Orange) and Ice Room J23 JUMMPER from PCB Typical Ground Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #92, CN78-"10"(Orange) and J23 JUMMPER from PCB Typical Ground are similar. → Check the measure on the voltage of Resistance, R316 due to the SMD MICOM

☞ Checking Mehod of Ice Room Sensor voltage

CN78-"10"(Orange)↔ CN76-”1” (Gray) -C ompare with the temperature table after measurement.

Is MAIN PCB Connector CN78 and CN76 inserted correctly?

NO

YES Is Ice room sensor unit normal?

Bad contact of connector/ insert correctly NO

Replace temperature sensor

YES Is the voltage between MAIN PCB Connector CN78-"10"(Orange) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM #92 normal?

Check the wiring connection NO

YES

No trouble with PCB and temperature sensor.

Check the bad connections.

☞Checking Method of Ice Room Sensor Voltage - Measure the voltage of Resistance, R316(IC01 MICOM #92) on PCB or CN78-"10"(Orange) ↔J23 JUMMPER - Compare with the temperature table after measurement.

Measured voltage of CN78-"10"(Orange) ↔ J23 JUMMPER are as below

75

Check the iced-solder, solder bridging, disturbed solder

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

8) Mid Drawer Sensor has trouble ERROR Code

Start DATA1.

Temperature table ** M easuring point of resistance value according to Sensor ** Flex : CN30 ”9” ↔ CN76 ”1” measuring resistance value ** 0Ω: Short trouble / Ω∞: Open trouble

Is MAIN PCB Connector CN30 and CN76 insert correctly?

YES Is Mid drawer Sensor normal?

Refer to circuit diagram in the manual Sensor MICOM/Connector number Mid Connector CN30-"9"(Yellow) to drawer J23 JUMMPER PCB typical Ground Voltage measured between 4.6V ~ 0.6V. Measuring voltage of IC01 MICOM #87, CN30-"9"(Yellow)and J23 JUMMPER from PCB typical Ground part are similar. → Check the measure on the voltage of Resistance, R314 due to the SMD MICOM

NO

Bad contact of connector/ insert correctly NO

Replace temperature sensor

YES Is the voltage between MAIN PCB Connector CN30-"9"(Yellow) and J23 JUMMPER normal?

NO(0.6V > Measurement < 4.6V)

YES Is the input voltage of IC01 MICOM Pin #87 normal?

Recheck the wiring connection NO

YES

No trouble with PCB and temperature sensor.

Recheck the bad contact of the connection.

☞

hecking method of Mid drawer Sensor resistance C CN30-"9"(Yellow) ↔ CN76-”1” (Gray) - Compare the temperature table after measurement.

☞ C hecking method of Mid drawer Sensor resistance CN30"9"(Yellow) ↔ CN76-”1” (Gray) - Compare the temperature table after measurement.

Measuring voltage of CN30-"9"(Yellow)↔J23 JUMMPER are as below

76

Check the iced-solder, solder bridging, disturbed solder

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

9) If Humidity Sensor has trouble ERROR Code

Start Is MAIN PCB Connector CN30 inserted correctly? ** Measuring point of resistance value according to Sensor" Humidity : CN30 ”1” ↔ ”3” Resistance value with opened : about 50Ω ** 0Ω: Short trouble /Ω∞: Open trouble Refer to circuit diagram in the manual Sensor MICOM/Connector number CN30-"3"(brown) to Humidity Connector J23 JUMMPER PCB typical Ground Voltage measured between 3.5V ~ 1.0V Measuring voltage of ICO1 MICOM #81, CN30-"3"(Brown) and J23 JUMMPER from PCB typical Ground part are similar. → Check the voltage of Resistance, R321

NO

YES Is Humidity Sensor unit normal?

Bad contact of connector /insert correctly NO Replace the Humidity Sensor

YES

DATA2. Humidity Sensor Table

Is the voltage between MAIN PCB Connector CN30-”3”(Brown) and J23 JUMMPER normal?

NO (1.0V > Measurement < 3.5V)

YES Is input voltage of ICO1 MICOM #81 normal?

Recheck the PCB & Wire Terminal connection NO

YES

No trouble with PCB temperature sensor.

Recheck the bad contact ofthe connection

☞

hecking method ofHumidity Sensor resistance C CN30-"3"(Brown) ↔ "1"(Gray) - Compare the temperature table after the measure.

☞ Checking method ofHumidity Sensor voltage.

- Measure the voltage of Resistance, R321(IC01 MICOM #81) on PCB or CN30-"3"(Brown) ↔ J23 JUMMPER - Compare the temperature table after the measure.

Measuring voltage of CN30-"3"(Brown) ↔ J23 JUMMPER are below

77

Check the iced-solder, solder bringing, disturbed solder Exchange the PCB

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

10) Mid Drawer Room Damper Heater has trouble (OPTION) ERROR Code

Start Is Damper Heater normal?(about135ohm)

NO

YES Measure the voltage of Resistance between ① - ② after CN77 connector open / 1350 ohm ± 7%

Is MAIN PCB connector (CN77) inserted correctly?

Bad contact of connector/ insert correctly NO

YES Initial MICOM power On Heater off #56 ~ 3.5V ~ condition 3.5V 4.8V 4.8V

Working heater 0V

Is the input voltage of IC01 MICOM #56 normal?

YES

Normal(recheck)

☞ Checking method of Flex Zone Room Damper resistance CN77-"1"(Black) ↔ "2"(Brown) ** Ω∞: Open (wire disconnection, heater disconnection) trouble / 0Ω: Short trouble

78

NO

1) Wire connector 2) Replace Heater 1) Recheck the wire 2) Replace PCB MAIN

TROUBLESHOOTING

4-2-2. If FAN does not operate - The refrigerator of this model has BLDC FAN motor. BLDC motor is driven by DC 7~12V. - On the normal condition of COMP ON, it operates together with F-FAN motor.

If door is opened and closed once at a high ambient temperature, it will be operated after 1 minute delay.

Therefore, you are advised not to taken it for an error.

-. If there is a trouble, you should select the self-diagnostic function to check the trouble before power off.

Start

Is COMPRESSOR ON ?

Execute manual operation Is the voltage between MAIN PCB Ground J23 JUMMPER and CN 76”5”(Sky -blue) around DC7~12V?

Is the voltage between MAIN PCB Ground J23 JUMMPER and CN 76 ”3” (Yellow) around DC7~12V?

Is the voltage between MAIN PCB Ground J23 JUMMPER and CN 76”4” (Orange) around DC7~12V?

FAN work normally Is the voltage between MAIN PCB Ground J23 JUMMPER and CN76"11" (White) around 4.5~5V?

Is the voltage between MAIN PCB Ground J23 JUMPER and CN 76-"12"(Purple) around 0V?

Is the external temperature above 66.2℉(19℃ )?

Repair the connection of Door switch Recheck after 7 minutes (Time could be delayed depending on the temperatures. If the temperature is lower, It may not operate : about 59℉ (below 15℃)

Door & MICOM State Door

F MICOM (#29)

R MICOM(#28)

Close Open

5V(High) 0V(Low)

0V(Low) 5V(High)

Right and Left

Power ON with 7 minutes delay after power OFF. For preventing the over load of compressor)

Does DC7~12V alternate with below DC 2V between MAIN PCB Ground J23 JUMMPER and CN76 ”4”(Orange)

Does DC7~12V alternate with below DC 2V between MAIN PCB Ground J23 JUMMPER and CN76 ”5”(Sky-blue)

In initial power to appliance, the compressor and fans of fresh food/ freezer, compressor fan operate. If freezer temperature is sensed of 41℉ by momentary power failure, fans will operate after 7 minutes.

Does DC7~12V alternate with below DC 2V between MAIN PCB Ground J23 JUMMPER and CN76 “3”(Yellow)

Replace MAIN PCB Ground

F FAN pulse voltage CN76 “7”(Brown)

PCB Typical Ground J23 JUMMPER

The voltage measured around 2~3V with multi-meter though the voltage is very weak because of pulse signal

Reference CN76-7(F),8(R),9(C)will generate the pulse signal when motor rotates.

These signals will be inputted into MICOM. Unless signals are not inputted during motor operating, will be ON 10 seconds after fan Off. But if signals are not still entered, the above operation will restart four times more.

If signals are not entered continuously, the motor will be restarted after 10 Minutes. This function is effective when the normal operation of motor would be restrained by foreign matters such as ice.

☞ Display for checking the self-diagnostic function R FAN ERROR (Option)

F FAN ERROR

C FAN ERROR

• Expected causes ① Check that if FAN-MOTOR has failure itself. ② Check that if wiring connection has bad contact. ③ Check the input of the fan motor rotation pulse when motor fan operates.

PCB Typical Ground J23 JUMMPER

The voltage between PCB typical Ground J23 JUMMPER and F FAN ; CN76 ”3”(Yellow) shall be less than DC 7~12V. R FAN ; CN76 ”4”(Orange) shall be less than DC 7~12V. C FAN ; CN76 ”5”(Sky-blue) shall be less than DC 7~12V. - Recheck if resistance values are different after measuring.

1) F-FAN

79

2) R-FAN

3) C-FAN

TROUBLESHOOTING

4-2-3. If ICE Room Fan does not operate - This refrigerator has BLDC FAN motor. BLDC motor is driven by DC7~12V. - When COMP ON, normally operates with F-FAN motor.

- If there is any trouble, you should select the self-diagnostic function to check the trouble before power off.

- When pressing the ICE TEST S/W for a certain period of time (over 1.5sec), the function is accomplished. After beginning of TEST mode, Ice maker heater turns on for initial 2 minutes, if the ice making temperature is below 0℃.

- If it exceeds 0℃, Ice maker heater turns on for initial 30 seconds.

- After Ice maker heater turns on for 30 seconds, it turns off and then Ice maker motor turns on.

- As the Ice maker motor turns on, TEST MODE COUNT operates.

(6 minutes count)

Start

Is COMPRESSOR ON ?

Yes

Condition - Ambient temperature : 32℃/75% - Notch : 2℉/38℉(-19.0℃/3.3℃) Initial full of ice bucket capacity : 794 g, 58ea

Is the voltage between MAIN PCB Ground J23 JUMMPER and CN76-”2” (Black) around DC7~12V? No

Ice Room control temperature Ice ON

8.6℉(-13℃)

Ice OFF

26.6℉(-3℃)

Is the Ice Room temperature suitable for the Fan working?

Yes

No Execute manual operation

Yes FAN works normally

No Operation temperature/ready

Reference CN76 “6” will generate the pulse signal when motor rotates.

These signals will be input into MICOM. Unless signals are not input during motor operating, will be ON 10seconds after fan OFF. But if signals are not still taken, the above operation will be retried four times more. If signals are not taken continuously, the motor will be restarted after 10 minutes.

This function is against the case that motor movement would be restrained by foreign matters like ice.

FAN pulse voltage CN76-”6”(Pink)

PCB Typical Ground J23 JUMMPER

The voltage is variable due to pulse signal but measured about 2~3V with the MultiMeter.

☞ Display for checking the self-diagnostic function

Does DC7~12V alternate with below DC2V between MAIN PCB Ground J23 JUMMPER and CN76-"2"(Black)?

Yes

No Replace MAIN PCB Ground

※ Predicted Cause ① FAN-MOTOR troubles itself ② Bad wiring connections. ③ Wrong Input of the fan motor rotation pulse

☞ Checking method of Ice Room FAN Motor Voltage with the voltage between Ice Room FAN ; CN76-"1"(Gry) shall be less than DC 7~12V. - Ice Room FAN Motor Voltage shall be less than DC 7~12V. 1) Ice Room - FAN PCB Typical Ground J23 JUMMPER

Ice Room FAN ERROR

80

TROUBLESHOOTING

4-2-4. When ICE MAKER(FF) does not operate 1. Water will be automatically supplied to the Ice Maker depending on temperature & time conditions, and ice will be produced to dispense.

2. Power is applied to one end of the wires. So, make sure to refer to its Exploded View whenever doing the disassembly.

3. The operation of the Ice Maker shall be done after pressing the Ice Maker Test Button.

(Fridge Ice Maker) It is not possible to check when the power is off.

4. Since both of the PCB and the Ice Maker are located at the front and the back each other, make sure to have two people check them.

5. It may cause burn when the Ice Maker Heater heats up. So, please take an extra caution.

6. The Ice Maker has a counter-clockwise rotation function. So, its counter-clockwise rotation is normal.

Displays ERROR Code

Opration Condition while Motor is rotating Micom(IC01) Operation Status Stand-by On Motor Load (#74) Start

Micom(IC01) Operation Status #7 (Test Switch)

Stand-by

On

5V

0V

Ice Maker rotates when pressing the Ice Maker testing switch (over 1.5 sec)?

No

Yes

1) Check & Replace ICE MAKER KIT 2) Check Main PCB Input Signal & Replace it (Micom IC01 Pin #7 - "0V")

Micom(IC01) Operation Status #73 (Blade Ice Scoop)

Standby

Rotation

Before finishing

Completed

0V

4.9V

4.9V

0V

Ice maker Operation Status Home → Motor CCW Rotation → Motor CW Rotation → Water Supply → Normal ('Ding Dong' Sound)

0V

5V

Heater Load (#118) 0V 5V Heater operates differently according to the conditions. Test Mode operation will be 30 sec.

Input Voltage of IC01 MICOM #73 is normal?

No

Yes

Is the water supplied in 6 minutes (After detecting the full bucket and its horizontality)?

1) Check Wire Connection 2) Check & Replace ICE MAKER KIT 3) Check & Replace MAIN PCB No

Yes

Is the ICE Maker Sensor normal?

Yes

PCB & Ice Maker Related Parts are normal.

Check all the Wire Connections again.

81

1) Check & Replace Water Valve * Refer to Water Valve Operating Conditions 2) Check & Replace Main PCB No

1) Check & Repair ICE Maker Sensor * Refer to it when ICE Maker Sensor is defective

TROUBLESHOOTING

4-2-5. If defrost does not operate (F,R DEF Heater)

R DEF ERROR

F DEF ERROR

Start **Measuring point of resistance value according to heater** F-DEF : CN70 “3”(Brown) ↔ CN72 ”3” (Gray) measuring resistance value(63 ohm ± 7%) R-DEF : CN70 ”1”(White) ↔ CN72 “3”(Gray) measuring resistance value(120 ohm ± 7%) ** 0Ω: Short trouble / Ω∞: Open(bimetal, heater) trouble

Reference to the manual “Self-Diagnostic”

Are the all deforst heater normal?

Check the bimetal, heater disconnection, wiring connection etc.

Refer to self-diagnostic function in the manual

Is defrost sensor by self-diagnostic normal?

Replace the applicable sensor

**Measuring point of resistance value according to sensor ** F-DEF : CCN30-”5” ↔ CN76-”1” measuring resistance value R-DEF : CN30-”8” ↔ CN76-”1” measuring resistance value ** 0Ω: Short trouble / Ω∞: Open trouble

Is the temperature of defrost sensor lower than 53.6℉(12°C)?

manual operation for a certain time

Resistance value of sensor according to temperature 86℉(30℃) 68℉(20℃) 50℉(10℃) 32℉(0℃) 14℉-10℃) -4℉-20℃) -22℉(-30℃)

4.22kΩ 6.05kΩ 8.87kΩ 13.29kΩ 20.42kΩ 32.23kΩ 52.41kΩ

If you need the temperature with detail, refer to DATA1. temperature table

Manual defrosting of fresh food and freezer compartments operate simultaneously.

Is power applied to each defrost heaters?

Recheck the applicable sensor.

Does the system return to cooling operation after heating for specified time?

Reference If defrost sensor temperatures of fresh food and freezer compartments are higher than 50℉(10℃), 53.6℉(12℃) by the heating from heater, heating would be finished and will return to cooling operation after a pause.

Normal

Is connection terminal of MAIN PBA part normal?

☞ Checking method of F,R DEF Heater resistance value CN70-"3"(Brown) ↔ CN72 "3"(Gray) CN70-"1"(White) ↔ CN72 "3"(Gray) - Recheck if resistance values are different after the test

1) F DEF Heater

If Energy Saver + Fridge Key are pressed simultaneously for 8 seconds and then select any key, 3rd test mode(manual defrosting) will be operated.

Repair connection terminal Check bimetal, heater itself, disconnection etc.

2) R DEF Heater

Replace failure Relay or replace PBA ASS'Y

82

TROUBLESHOOTING

4-2-6. When Power is not applied Caution At the power of SMPS PCB, the AC115(230)V power and a high-voltage over DC 170(325) V are occurred.

Please take care of yourself on repair and measurement.

Start

No Is the power plug connected?

Yes

Check the SMPS PBA -. 12V : CON02(#1<>#3) -. 5V : CON02(#5<>#3

Does the SMPS deliver normal output voltages of 12V and 5V?

Make sure the plug is connected and not loose.

No

Yes Replace the PCB ASSY

Does the Panel PCB function properly?

No

Yes

Is there any soldering short or poor soldering job detected on PCB?

Yes

Normal

83

4-2-9. Panel PBA Check

No

1. Resolder the PCB 2. Replace the PCB MAIN

TROUBLESHOOTING

4-2-7. When Compressor does not run (Inverter COMP.) Start

Refer to the TEST Function in this manual Forced Operation signal sound should be checked 0~800Hz 50% Duty Signal Output

10 minutes have passed since COMP was off Yes

No

When Forced Operation mode is activated, COMP operates Yes Yes

No

F-Sensor is Good No

COMP operation signal (CN103 #1 <>#3) is about DC2~3V

No

Check the Noise Filter & Power Cord

Yes Temperature sensing part of MAIN PBA is Good

Yes

1) Check the wire harness 2) Replace the MAIN PBA

No

Check in 10 minutes

Is AC 115V applied to CN101?

Yes

Make sure the connector is plugged properly.

Is DC 15V applied to ZD501?

Yes Replace MAIN PBA or Repair the connection

Yes

Is DC 5V applied to C108(C110)?

Yes

COMP Connector (CN102) is Good?

Yes

COMP ASS'Y is Good Yes Normal

84

No Make sure the connector is plugged properly.

No

1) Check the COMP Wire 2) Check the Compressor No

Replace COMP ASS'Y

No

Replace F-Sensor No

Repair the sensing part or Replace MAIN PBA

TROUBLESHOOTING

4-2-8. When alarm sounds continuously without stop(related with buzzer sound) ① If 'ding-dong'sound continuously Start

Is door closed completely?

Door is ajar Remove causes after comprehending the conditions of interferance by door gasket, food etc,

Is water penetrated into the door switch?

Replace Door S/W Seperate the door switch andcheck if the measured value of unit is changed from 0Ω to Ω∞ according to switch ON/OFF. * FF Door Switch is magnetic switch. ( It can be operated when door magnet is combined with it.)

Is the door switch unit normal?

Replace Door S/W Is the connector CN76 inserted correctly?

Connector is not inserted, Repair disconnect part

Door & MICOM State Door

Is the input voltage of main #29,#28 changed at door-open and close status?

FF MICOM(#28) FZ MICOM(#29) Mid-drawer Micom(#27) Right and Left

Close

0V(Low),

0V(Low)

Open

5V(High)

5V(High)

Repair wire connection and Door S/W

MAIN PCB & Door S/W is normal.

Recheck and replace Panel PBA

② If 'beep-beep' sounds continuously

Start

Is manual operation /defrost selected?

Enforce the cancelation the manual operation/ defrost function or power On after power Off Does buzzer sounds when power On again?

Normal

Recheck and Replace Panel PBA

85

TROUBLESHOOTING

â&#x2018;˘ If buzzer does not sound Buzzer is installed on the panel PCB in this model.

If buzzer does not sound even though the button is pressed, manual operation is started and door is opened, it should separate panel PCB and check the breakage of buzzer and bad soldering.

It is very hard to repair the panel PCB because it consists of SMD assemblies.

It is recommended to replace PCB assembly when the failure associated with panel is occurred except the minor error such as switch pressing error, surface peeling off and so on.

Start

Does it sound 'dingdong' if press a button on the front panel?

MAIN PCB normal, BUZZER normal Does it make a sound of door open alarm when you are opening the door of freezer or Fridge more than 3 minutes?

Check the panel PCB with reference of <how to check Panel Display> Is there any damage or breakage of the buzzer in the panel PCB?

Replace Panel PCB Did lead of a component fall on the vibration plate of buzzer?

Replace Panel PCB Recheck the button pressing force and mechanical problem

86

TROUBLESHOOTING

4-2-9. When the Panel PBA does not operate normally ① When the entire or a certain section of the Panel PCB does not light up - There is a MICOM embedded in the Panel PCB. So, take care when doing repairs. And, except the Solder Touch, replace the PCB. Start

Refer to the Circuit Diagram of this manual or the Wiring Diagram attached at the back of the unit.

Is the connetor insertion of freezer upper-hinge nomal?

No

Insert Connector again Repair the contact trouble

No

Insert MAIN PCB Connector again

No

Insert Connector again Repair the contact trouble

Yes

Replace Panel PCB

Yes MAIN PCB Connector (CN50) is inserted normally?

Yes The Panel PCB Connecter is connected properly?

Yes When replacing Panel-PCB, it lights up?

NO Check the Dispenser and the Top Cover Hinge Connectors.

Check the Wire Cut and the Wire Short.

Check the wire connection between the Fridge Top Cabinet and the Main PCB Connector.

Check the Wire Cut and the Wire Short.

①

②

② When the Panel PCB buttons do not work ※ When it keeps troubling after check with the above procedures [Check after turning off the unit and turning it on again]

Buttons get stuck being pressed down?

Yes

Re-assemble PCB ASS'Y or clear the restriction

Yes

Re-assemble PCB ASS'Y or clear the restriction

Yes

Replace Panel PCB

NO Buttons get stuck being pressed down?

NO Buttons get stuck being pressed down?

NO Check the Dispenser and the Top Cover Hinge Connectors.

Check the Wire Cut and the Wire Short.

Check the wire connection at the Fridge Top Cabinet.

Check the Wire Cut and the Wire Short.

Check Short/Open at the Panel Communication & the Power Supply Circuit of the Main PCB

①

②

③

Since all Touch is used for the Panel PCB Switch, be sure to turn off the unit and turn it on again after doing a repair. [It is to adjust the sensitivity of the Touch Panel.]

87

TROUBLESHOOTING

4-2-10. If Mid drawer Panel PCB is not working normally You should check the display after door opening because the display of this model operates only when the fresh food compartment door is opened.

Start Does R room Door switch operate normally?

Check and repair the switch * Refer to <how to repair door switch> Is the connector of mid drawer room inserted correctly Reinsert Connector, Repair bad contact Is MAIN PCB Connector (CN51) inserted correctly?

Reinsert connector in MAIN PCB

Is signal of MAIN PCB CN51 normal?

If Panel Key is not selected

Check voltage/Replace MAIN PCB

Is the lighting operated when replace mid drawer Panel-PCB? Panel PCB itself has trouble. ① Check the wires of Mid drawer Room - disconnection, short between wires ② Recheck the control circuit of MAIN PCB Mid drawer Panel ③ Check the wire assembling between Panel and MAIN

② If Panel PCB Key is not selected ※ If it is not repaired with the above basic checking method PCB Typical Ground J23 JUMMPER The Voltage of KEY is Working every 2msec/4min

Is a key pressed continuously?

Reassemble PCB ASS'Y / Enforce the cancelation of pressed keys

☞ Checking method of voltage Based on PCB typical Ground J23 JUMMPER 1) Key voltage ; CN51-"11"(Sky Blue) a) Working: 2V±0.5V b) Normal: 0V

Is the PCB system still operated by separating of the mechanism?

Is the lighting operated after replacing the Mid drawer Panel-PCB?

Reassemble PCB ASS'Y / Enforce the cancelation of pressed keys

Convertible compartment Panel PCB itself has trouble.

Is a normal voltage outputted from MAIN PCB IC51 during the key operating?

① Replace MAIN PCB ② Check the short of MAIN Panel wire ① Check the wire of Mid drawer Room - disconnection, short between wires ② Check the short/open of the mid drawer panel lighting circuit in MAIN PCB.

88

TROUBLESHOOTING

4-2-11. When refrigerator ROOM Lamp does not light up When controlling the regrigerator light with Regulator(12V) : LED LAMP → Applying to the F/R Room compartment (Option) * If the Vegetable Lamp does not work properly, check the R compartment LED Lamp because it is connected with the R compartment LED Lamp in parallel. Refer to the circuit diagram to repair.

Start

Door & MICOM State Door

MICOM(#28) Right and Left

Close

0V(Low)

Open

5V(High)

Does the DOOR S/W sense properly?

(Open/Close)

No

Yes

Check/Replace REED S/W, Magnet ASS`Y

MICOM State FF

FZ(MID)

#28

#29(#40)

Close

0V(Low)

0V(Low)

Open

5V(High)

5V(High)

Door

IC76(R)/IC77(F) State IC

IC76(R) / IC77(F) / IC78(MID)

0V(Low)

0V(Low)

5V(High)

11~12V(High)

Is the output voltage of IC01 MICOM #28 normal?

No

Yes

Replace/Repair the PCB

Is the output voltage of IC76 normal?

No

Replace/Rep air the PCB. Repair IC76

Yes Is the MAIN PCB connector(CN78) inserted properly?

No

Check the wire Re-insert the connector

Yes Does the MAIN PCB connector(CN78) output properly?

(11~12V)

No

Check the connector terminal Replace PCB

Yes

No

Is the LED LAMP connected properly?

Yes

Check the connector terminal No

Is the LED LAMP no­mal?

Yes

Replace LED LAMP

Normal

1) M easuring output voltage - Measuring the voltage of PCB typical Ground J23 JUMMPER and IC76 voltage( CN78-"3"(Red)/R LED), IC77 voltage (CN78-"1"(Brown)/F LED) R LED Lamp ON

Checking method of Door switch voltage.

- Measuring voltage of CN76-"12")(Purple) typical Ground J23 JUMMPER Close

R LED Lamp OF

Open

89

↔

PCB

PCB Typical Ground J23 JUMMPER

TROUBLESHOOTING

4-2-12. If ICE Water is not supplied 1. Please shut the water supplying prior to repair.

2. Power is applied to the one end of wires. Be careful when disassembling not to get an electric shock.

2) Ice Water(R) Valve Start PCB Typical Ground J23 JUMMPER Is the confirming sound of the valve operation heard when Ice maker test switch pushed?

YES

Normal(Check Ice water valve hose)

NO

Check soldering short/Replace PCB

NO

Check soldering short/Replace PCB

NO

Check soldering short/Replace PCB

NO

Check soldering short/Replace PCB

NO

Does Main PCB IC01 MICOM #7 voltage change 5V/0V? YES

☞ Checking method of voltage Based on PCB typical Ground J23 JUMMPER 1) Check the voltage of IC73-"4"(same voltage as IC01 “104”, IC72-”3”(same voltage as IC01 “117”) - ICE Water valve waiting (about 0V)

Does Main PCB IC01 MICOM #104 voltage have high(5V) output?

NO

Does Main PCB IC73-"13" have about 0.7V output?

YES

Based on PCB typical Ground J23 JUMMPER 2) IC73-”13” and IC72-”14” voltage - ICE Water valve Waiting (about 12V±0.8V) - ICE Water valve operating (about 0.7V±0.5V)

Is the contact point of main PCB RELAY RY78 normal?

YES

3) Check the voltage of Water Valve operating (AC voltage) => The Relay RY78 and RY73 operating.

CN70-”5”(Red) <->CN73_1-”1”(Purple) CN72-”3”(Gry) <->CN70_1-”1”(Org) - ICE Water valve waiting (about AC 0V)

MAIN PCB normal -- Need to check the other parts ① Check the wire between Ice water valve↔MAIN PCB ② Ice water valve itself has trouble or bad contact of connector ③ Check the connection hose

90

TROUBLESHOOTING

4-2-13. If Cubed or Crushed Ice is not supplied Fridge door shall be closed during operation.

Start

No

Are Ices ejected?

Yes

No

Are Ices in the Ice bucket?

Check the Ice making switch Check the DOOR Switch Check the Ice moving motor Check the wiring connections of Ice moving motor Check if the COVER ICE ROUTE opens Check the Q706 movement related with AUGER_ MOTOR safety

① ② ③ ④ ⑤ ⑥ Which mode is selected?

Is “Ice Off” mode selected on the display panel?

No

Yes ① Check the water pipe : bending / Shut off ② heck route of ice check solenoid ③ Check he Ice Maker wiring

Cancel the “Ice Off”

Crushed Ice

Cubed Ice Cubed Ice ejected Is Cubed Ice ejected?

Is Crushed Ice ejected?

No Is Cubed Ice mode selected on the panel PCB?

Is the CUBE MOTOR positioned at cubed ice mode?

No

Yes Is the Dispenser Cover opened?

Yes Is IC73 1,2 changed into 5V when pressing Ice Switch?

After disconnecting the CN72, CN73 measure The both ends of Contact points RY7A.

Yes

Normal Operation status

No

Yes

No

Is the CUBE MOTOR positioned at cubed ice mode?

No

Crushed Ice selected

No

Yes

Check the wire connections/ Cube Solenoid

Is MICOM IC01 #88 change into 0V when press Ice switch?

Yes

- Check the Ice switch has trouble itself - Check the wire connections - Replace the MAIN PCB

No

Is the Dispenser Cover opened?

- ICE S/W self diagnosis - Check the connecting wires.

- MAIN PCB failure : Replace

Check the wire connections/ Motor Cube

No - Check the Ice switch has trouble itself - Check the wire connections - Replace the MAIN PCB

No

Yes

No

Yes Is the contact point of RY7A & RY7B RELAY changed into 0Ω

Is Crushed Ice mode selected on the panel PCB? Cubed Ice selected

Yes Is MICOM IC01 #88 change into 0V when press Ice switch?

No

Normal Operation status

Yes

Yes

Is IC73 #1 changed into 5V when pressing Ice Switch?

No

Yes

Replace the MAIN PCB (Errors on IC01)

No

Is the contact point of RY7A RELAY changed into 0Ω - RY7A, RY7B RELAY Error - Replace the MAIN PCB

After disconnecting the CN72, CN73 measure The both ends of Contact points RY7A.

If MAIN PCB is normal - Need to check the other parts ① AUGER MOTOR ↔ MAIN PCB Check the door wiring connections. ② CUBE MOTOR ↔ MAIN PCB Check the door wiring connections/trouble their own or bad wiring connections.

91

Yes

check the WIRE & Motor check Cover ice route S/W 1,2 Replace the MAIN PCB

Replace the MAIN PCB (Errors on IC01)

No - RY7A RELAY Error - Replace the MAIN PCB

TROUBLESHOOTING

4-2-14. If Cover Ice Route Motor(Geard Motor) is not working normally Caution 1. When replacing the Cover Ice Motor, pull out the plug to avoid an electric shock.

2. Be careful! When disassemble the Cover Ice Motor, spring can jumped out and may cause personal injury.

3. Motor will rotate continuously when the Motor Switch is not sensed.

Start

☞ Checking Mehod of Cover Ice Route Motor Resistance (Make sure to work after Power Off) the voltage of Resistance is variable according to the input voltage.

CN70 -"5" (Red) ↔ CN73_1 -"3" (Blue) ** 0Ω: Short trouble / Ω∞: Open trouble

Does GEARED MOTOR work properly?

Yes Is Cubed or Crushed Ice mode selected on the LED PANEL?

Yes Is the DISPENSER switch selected?

Yes Does the wiring at the both sides of motor connected properly?

Yes When the MOTOR rotates.

Is the AC input voltage applied to the both ends of the motor?

No

No Replace the MOTOR

No Cubed or Crushed Ice is selected on the LED PANEL PCB

No Select the DISPENSER switch

No Check the WIRE

Yes Check the MOTOR/Check any interference on MOTOR rotation

① Check CN73_1-"3" Connector / Re-connect ② Check the short/open for the SSR75 of Cover Ice Motor on Main PCB. ③ Check the voltage of Resistance of parallel Connector CN73 -"3", CN70 -"5" (Definitely plug out prior to repair)

Is the sensing SWITCH connection normal?

Yes Is the switch pressed area normal when motor rotates?

Yes

Operating Condition of Dispenser Open/Close CN50 - Switch 1,2 Operating Ice Route Switch 1 CN50 - “9” (Purple) Ice Route Switch 2 CN50 - “10” (White)

Close

ing

Open

0V

5V

0V

0V

5V

0V

Are the voltage J23 JUMMPER and CN50-”9”, “10” normal?

No

No Check/Repair the Housing connector

No Check/Repair the Motor Rotation pressing area

Yes Normal

① M ain PCB - Check the wire OPEN/SHORT between the Cover Ice Motor Rotation sensing switches. ② Check the Short of Cover Ice Motor Control Circuit SSR75 in the MAIN PCB. ③ Replace the MAIN PCB or the Dispenser Cover Motor.

92

TROUBLESHOOTING

4-2-15. IR Sensor Trouble-Shooting 1. W h e n t h e I R s e n s o r i s d e f e c t i v e , i c e i s n o t p r o d u c e d e v e n i f t h e r e i s n o Ice Maker Error, Ice Maker Sensor Error or the Ice Maker Function Error.

(When turning on the Self Diagnosis Function, it does not produce ice even if there is no 14E(C), 15E(C) or 39E(C) being displayed.)

2. Proceed with the Fridge Door being open and the Ice Bucket being removed.

Start

Indicator Location for Ice Full in Fridge Blinking : Ice Full Keep On : Not Ice Full

Remove the Ice Bucket and turn on the Load Status Display Function.

Ice Full in Fridge Room

No

Yes

Take a photo of the Emitter with the Cell Phone.

The Emitter is on.

Block the Receiver with a hand.

No

Fridge : Changes to Ice Full

Yes

Receiver Defect

No

Yes

Emitter Defect

Emitter Normal

Receiver Normal Emitter Normal

Emitter Defect

93

Receiver Defect

TROUBLESHOOTING

4-2-16. LED blinking frequency depending on protecting functions If Failure Condition is detected during compressor is operating, immediately stop Compressor operating and stand by 5 minutes. During this 5 minutes, RPM command signal is not available. It means, even if available RPM command signal is applied to the compressor, it does not work and keep standing by.

Blinking time is 1 second and dwell time is 2 seconds.

LED Blinking Frequency

Protecting Functions

Remarks

Normal Operation

N/A

1. Short between COMP U,V, and W phase(CN04) 2. Short among IPM Pins(No. #1 ~ 26) 3. Drop the IPM operating Voltage under DC 13.5V IPM Fault 4. Other cases, check the COMP, cycle, etc.

Abnormal 1. Open the COMP wire(CN04) Current 2. Bad condition of R1(ex. Bad soldering.)

Detection 3. Other cases, check the COMP, cycle, etc.

1. Operating the locked rotor COMP within 5 second.

2. Operating the COMP under 1000 RPM more than Motor Locked / 5 second.

Over RPM 3. Occur the huge change of input voltage in a moment 4. Other cases, check the COMP, cycle, etc.

1. Drop the input voltage under AC 53V Under Voltage 2. Short resistor R312(DC link resistor) 1. Increase the input voltage over AC 155V Over 2. Short resistor among R309, R310 and R311(DC Voltage link resistor) Starting Failure

LED blinking frequency depending on protecting functions

94

5. PCB DIAGRAM 5-1) PBA Layout with part position······························································································································96 5-2) PBA Layout with part position (Inverter Board)····································································································97 5-3) Connector Layout with part position (Main Board)·······························································································98 5-4) Connector Layout with part position (Inverter Board)··························································································99

95

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PCB DIAGRAM 5-1) PBA Layout with part position

1. DC12V, 5V, GND supplied from SMPS PCB (Not Used) 2. Circuit for controlling Step-Valve (3-Way Valve) * Option 3. FAN MOTOR control part : To supply the power from 8.3V ~ 12V according to the motor types. (F,R,C,ICE) 4. EEPROM : Save and record every kinds of data.

5. Transmit inputted signals from every sensor into MICOM after eliminate the noise.

6. Micom : control the regrigerator Ceramic resonator : generate the basic frequency of Micom operation.

Reset IC : make Micom reset if input voltage of Micom is detected less than the specified voltage 7. PLC input/output - PLC (Power Line communication) * Option (PLC module is not inserted unless specified occasion) 8. Operate ICE-MAKER, supply power to MOTOR, and sense the variation of switch.

9. Main Micom â&#x2020;&#x201D; Panel Micom serial communication circuit - Dispenser option input part (Water & Cover Ice route switch) 10. Mid drawer Room display control part : display LED, detect KEY state.

11. Control Mid drawer Room damper & Damper heater 12. Water Tank Heater Controls (also controls other options) 13. LED LAMP Control Circuit (F,R room Lamp) 14. Relay parts that controls AC load and receives Micom operating signal through Sink IC. 15. Connector with AC load a. Diode option setting area b. Inverter COMP controlling signal c. Flow Sensor controlling signal 96

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PCB DIAGRAM 5-2) PBA Layout with part position (Inverter Board)

1. PCB Power Supply : From the AC Input Voltage(115V), it supplies DC 15V and 5V to the Inverter circuit for the Compressor control.

2. COMP Driving / Feedback Circuit It receives the COMP operation signals from the Main PBA and feedbacks the inverter errors to the Main PBA. 3. Micom (MN103SFC2D) 4. BOOTSTRAP Charger : It is an independent power circuit for the driving of the IMP HighPhase IGBT. 5. Current Pickup Circuit : It pickups the currents taken by the Shunt resistance and does the PWM DUTY control.

6. IPM (FNE41060)

97

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PCB DIAGRAM 5-3) Connector Layout with part position (Main Board)

Main Valve

Mid DRAWER-DOOR Switch

OPEN

MID DRAWER ROOM DISPLAY ICE Pipe Heater(FF) F/B ICE Water Pipe Heater (FF) Mid Drawer Room LED Driver OPEN Mid Drawer Room Switch OPEN OPEN

Ice Room Heater

98

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PCB DIAGRAM 5-4) Connector Layout with part position (Inverter Board)

AC 115V

COMP

① ② ③ ④

99

: : : :

DC 5V GND COMP. RPM COMP. Feedback

This document can not be used without Samsung's authorization

6. Wiring Diagram

100

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7. Block Diagram 7-1) Whole block diagram

7-1-1. MAIN BLOCK

101

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Block Diagram

7-1-2. INVERTER BLOCK

102

This document can not be used without Samsung's authorization

8. Model code table 8-1) RF28HM**

103

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Model code table 8-2) RF25HM**

104

272, Oseon-Dong, Gwangsan-Gu, Gwangju-City, Korea, 506-253 TEL : 82-62-950-6193, 6896 FAX : 82-62-950-6829

Europe, CIS, Mideast & Africa: gspn1.samsungcsportal.com Asia: gspn2.samsungcsportal.com North & Latin America: gspn3.samsungcsportal.com China: china.samsungportal.com

- This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International or domestic law.

Š Samsung Electronics Co., Ltd. Refrigerator Division 2013 Printed in Korea